Why Is the
Planet Warming?

Coal, oil, and natural gas account for over 75% of global greenhouse gas emissions. When burned, they release carbon dioxide (CO₂) that was locked underground for millions of years — flooding the atmosphere with carbon far faster than natural systems can absorb it.

The energy sector alone — electricity, heat, and transport — is responsible for roughly 73% of all human-caused emissions. Power plants burning coal are the single largest source, followed by road transport and industrial heating.

Forests absorb roughly 2.6 billion tonnes of CO₂ every year — about a quarter of all human emissions. When trees are cut down or burned, that stored carbon is released back into the atmosphere. Deforestation accounts for approximately 10% of global greenhouse gas emissions.

The Amazon, Congo Basin, and Southeast Asian rainforests are the most critical. The Amazon alone stores an estimated 150–200 billion tonnes of carbon. Deforestation also destroys biodiversity and disrupts regional rainfall patterns.

Agriculture contributes about 18–20% of global greenhouse gas emissions — not primarily through CO₂, but through methane (CH₄) and nitrous oxide (N₂O), which are far more potent warming agents over short timescales.

Livestock — especially cattle — produce methane through enteric fermentation (digestion). Rice paddies emit methane as organic matter decomposes in flooded fields. Synthetic fertilizers release nitrous oxide, which is 265 times more potent than CO₂ over 100 years.

Industrial processes — cement, steel, chemicals, and manufacturing — account for about 21% of global emissions. Many of these are "hard-to-abate": the emissions are a direct byproduct of the chemical process, not just the energy used.

Cement production alone releases about 8% of global CO₂ — half from burning fuel, half from the chemical reaction that turns limestone into lime. Steel production requires extremely high temperatures that are difficult to achieve without fossil fuels.

Feedback loops are self-reinforcing cycles that amplify warming beyond what human emissions alone would cause. They are one of the most alarming aspects of climate science — and one of the reasons scientists urge urgent action.

The ice-albedo feedback is one of the most significant: as white ice melts, it exposes darker ocean or land, which absorbs more heat, causing more melting. Permafrost thaw releases methane and CO₂ stored for thousands of years. Warmer oceans absorb less CO₂. Each of these feedbacks accelerates the others.