Climate Technology
Solar panels, heat pumps, electric cars, grid batteries, machines that pull CO₂ out of the air, and the software that counts a company’s emissions: all of them get called climate technology. The label covers anything whose main job is to cut greenhouse gases, remove them, or help people cope with a warming climate.
It is now a large share of the world’s energy spending, and some of it has become cheaper than the fossil technology it replaces.
Climate technology (climate tech) is any technology that reduces greenhouse gas emissions, removes CO₂ from the atmosphere, or helps adapt to climate change: renewables, batteries, electric vehicles, heat pumps, low-carbon industry, carbon removal and the software that measures emissions.
What climate technology is
Climate technology is technology deployed primarily to tackle climate change. Most of it cuts emissions by replacing a fossil-fuelled way of doing something with a cleaner one; a smaller part removes CO₂ already in the air; and a growing part helps communities and businesses adapt to heat, floods and drought.
The term overlaps with “clean tech”, which is older and usually means clean energy, and with “green tech”, which can include wider environmental goals such as clean water. “Climate tech” is defined by its purpose rather than its sector: a steel plant running on hydrogen, a plant-based protein and an emissions-tracking platform can all count.
It is the practical side of decarbonisation. Targets such as net zero set where emissions need to go; climate technologies are most of how they get there.
Definition at a glance
| What it is | Technology whose main purpose is to cut emissions, remove CO₂ or adapt to climate change |
|---|---|
| Also called | Climate tech; clean tech (energy-focused); green tech (broader) |
| Main categories | Clean power, storage and grids; transport; buildings; industry; food and land; carbon removal; adaptation; measurement software |
| Investment | About $2.2 trillion a year goes to clean energy alone (IEA, 2026) |
| Judged by | Tonnes of CO₂e avoided or removed, and cost per tonne |
| Not the same as | Carbon offsets, which are credits for reductions, not technologies |
What the IPCC says
B.4.1 — “From 2010 to 2019, there have been sustained decreases in the unit costs of solar energy (85%), wind energy (55%), and lithium-ion batteries (85%), and large increases in their deployment, e.g., >10× for solar and >100× for electric vehicles (EVs), varying widely across regions.”
C.12 — “Mitigation options costing USD100 tCO2-eq−1 or less could reduce global GHG emissions by at least half the 2019 level by 2030.”
The same section adds a caution. Small, modular technologies such as solar panels and batteries got cheap quickly because they are made in huge numbers. Large, one-off technologies with fewer chances to learn from repetition — the IPCC’s example is “multiple large-scale mitigation technologies” — “have seen minimal cost reductions and their adoption has grown slowly.” That split explains much of what is cheap and what is still expensive in climate tech today.
The main categories
| Category | Examples | What it replaces or does |
|---|---|---|
| Clean power | Solar, wind, nuclear, geothermal — see renewable energy | Coal and gas power stations |
| Storage and grids | Batteries, pumped hydro, transmission lines, smart grids | Fossil plants kept on standby for when the wind drops |
| Transport | Electric cars, buses and trucks; sustainable aviation fuel | Petrol and diesel engines; jet fuel |
| Buildings | Heat pumps, insulation, efficient appliances | Gas and oil boilers |
| Industry | Electric furnaces, hydrogen-based steel, carbon capture on cement plants | Coal and gas used for high-temperature heat and chemistry |
| Food and land | Methane-reducing feed, alternative proteins, precision farming, biomethane | Emissions from livestock, fertiliser and land clearing |
| Carbon removal | Direct air capture, BECCS, biochar, enhanced weathering | Takes CO₂ out of the atmosphere — see carbon dioxide removal |
| Adaptation | Flood defences, drought-tolerant crops, heat warning systems | Reduces damage from climate change rather than its causes |
| Measurement | Carbon accounting software, satellite methane detection, emission factor data | Measures emissions so they can be managed and verified |
How much is invested
Clean energy is the largest and best-measured part of climate tech. The International Energy Agency’s World Energy Investment 2026, published on 28 May 2026, puts total global energy investment at a record $3.4 trillion this year:
Nearly two dollars now go to clean energy for every dollar that goes to fossil fuels.
Those figures cover energy only. Climate tech outside energy — food, carbon removal, adaptation, software — is smaller and harder to count, and estimates vary widely depending on what each tracker includes.
Mature, scaling and early-stage
Climate technologies sit at very different stages, and the difference matters for anyone choosing between them:
- Mature and cheap: solar, onshore wind, LED lighting, many electric vehicles. These are bought for cost as much as for climate.
- Commercial but scaling: heat pumps, grid batteries, offshore wind, electric trucks. Proven, but limited by supply chains, grids or upfront cost.
- Early or expensive: green hydrogen at scale, low-carbon steel and cement, direct air capture. These are the large, one-off technologies the IPCC notes have fallen in cost slowly, and they matter most for heavy industry, where cheaper options are scarce.
A useful way to compare them is cost per tonne of CO₂e avoided, which is what a marginal abatement cost curve ranks.
How climate tech is measured
A climate technology is only as good as the emissions it actually avoids, and that depends on what it replaces and where. An electric car avoids more emissions on a low-carbon grid than on a coal-heavy one, because its electricity has a lower carbon intensity. So the same technology can have very different climate value in different countries.
Measuring that value uses the same arithmetic as any carbon footprint: activity data multiplied by emission factors, before and after. Avoided emissions are reported separately from a company’s own footprint; a company cannot subtract them from its scope 1, 2 and 3 total.
Worked micro-example
A home uses 12,000 kWh of heat a year.
- Gas boiler at 90% efficiency: 12,000 ÷ 0.9 = 13,333 kWh of gas × 0.18231 kg CO₂e/kWh [GreenCalculus fuels.gbr.natural_gas.kwh_gcv · DEFRA 2026 'Fuels'!D42 · v2026.237] = 2,431 kg
- Heat pump delivering 3 kWh of heat per kWh of power: 12,000 ÷ 3 = 4,000 kWh of electricity × 0.13096 kg CO₂e/kWh [GreenCalculus grid.gbr.electricity.location_based · DEFRA 2026 'UK electricity'!E25] = 524 kg
Avoided: about 1.9 t CO₂e a year, a 78% cut, using DEFRA’s 2026 factors. On a more carbon-intensive grid the saving would be smaller. Efficiency figures are illustrative; real ones depend on the boiler, the heat pump and the weather.
Common mistakes
- Assuming a technology has the same impact everywhere. An electric car or heat pump saves most where the grid is cleanest.
- Counting avoided emissions as a reduction in your own footprint. They are reported separately, not netted off.
- Treating carbon removal as a substitute for cutting emissions. Removal is scarce and expensive; it is meant for emissions that cannot be cut.
- Calling carbon offsets climate technology. An offset is a credit for a reduction somewhere else, not a technology.
- Ignoring the emissions of making the technology. Panels, turbines and batteries carry an embodied footprint; it is usually repaid quickly, but it is not zero.
Measure what a climate technology actually saves, using sourced emission factors for your country and grid.
Frequently asked questions
Solar panels and wind turbines, batteries and grid upgrades, electric vehicles, heat pumps, hydrogen-based steelmaking, carbon capture on cement plants, methane-reducing cattle feed, direct air capture and biochar for carbon removal, flood defences for adaptation, and carbon accounting software that measures emissions.
Clean tech is the older term and usually means clean energy: renewables, efficiency and storage. Climate tech is defined by its purpose, tackling climate change, so it also covers areas outside energy such as food, carbon removal, adaptation and emissions-measurement software. In practice the two overlap heavily.
For clean energy alone, about $2.2 trillion in 2026, out of $3.4 trillion of total energy investment, according to the IEA’s World Energy Investment 2026. That is nearly twice the $1.2 trillion going to oil, gas and coal. Investment in climate tech outside energy is smaller and less consistently tracked.
Yes. Technologies such as direct air capture, bioenergy with carbon capture and storage, biochar and enhanced weathering remove CO₂ from the atmosphere rather than preventing it being emitted. They are expensive and limited in scale today, so they are meant for emissions that cannot be cut, not as a replacement for cutting them.
Climate technology is any technology whose main purpose is to reduce greenhouse gas emissions, remove carbon dioxide from the atmosphere, or help people adapt to climate change. It ranges from mature, cheap options like solar power and electric cars to early-stage ones like green hydrogen and direct air capture, plus the software used to measure emissions.
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