The climate crisis is the defining challenge of our generation — and it's already here.

A practical introduction to climate change: the science, impacts, solutions, and what's happening in 2025-2026.

## Overview Climate change is the defining challenge of our era. This site brings together the latest data, analysis, and actionable insights to help anyone understand where we stand — not with doom or hope, but with evidence. **Why this matters now:** In 2025, we crossed multiple climate thresholds while simultaneously building clean energy at unprecedented scale. The next decade will determine whether the clean energy buildout outpaces warming.

In 2025, global CO₂ emissions from fossil fuels hit a record 37.2 gigatonnes — but the growth rate flattened to 0.7%. Clean electricity deployments avoided 10.3 Gt of emissions, and the power sector actually saw emissions decline by 0.9% year-over-year. That's the first structural decoupling of electricity demand from fossil fuel consumption in decades.

Line graphs comparing growth in renewable energy sources compared to reduction in fossil fuel usage in the European Union's electric power production — Renewable energy growth vs fossil fuel reduction in the EU power sector — RCraig09 (CC BY-SA 4.0)

For the first time, the power sector — historically the biggest obstacle to decarbonization — is showing real decoupling. That doesn't mean the crisis is solved. Transport, industry, and buildings still drive emissions growth. But it's a story the headline numbers miss. ### The Economic Case Climate action is becoming the cheaper option. In 2026, new utility-scale solar power is cheaper than new coal in every major market. The IEA reports renewable capacity additions hit 630 GW in 2025, up 50% from the previous year. Solar alone accounted for 75% of new renewable capacity globally. The cost trajectory is striking — solar module prices have fallen over 80% since 2020, while onshore wind has dropped 60%. Meanwhile, the cost of inaction grows: insurance losses from climate disasters exceeded $300 billion in 2025, and the World Bank estimates climate impacts could push 132 million people into poverty by 2030. As economist Nicholas Stern noted: "The cost of action is far less than the cost of inaction." That gap just widened dramatically. ### Key Findings 2026 is a pivot point. Three technologies from MIT's Breakthrough list are moving from lab to deployment:

Sodium-ion batteries — CATL started mass manufacturing in 2025. Cheaper, safer, more abundant than lithium-ion.
Next-generation nuclear — Kairos Power became the first US company approved to begin construction on a next-gen reactor.
Green hydrogen — Costs dropped below $5/kg, opening pathways for steel, shipping, and aviation.

Clean electricity deployments avoided 10.3 Gt of carbon emissions in 2025 — nearly a third of the emissions reductions needed annually to stay within 1.5 °C of pre-industrial temperatures.
— Nature Review Earth & Environment, 2026

Renewables accounted for 30% of global electricity in 2024 — the highest share ever. Solar alone added 447 GW. The gap isn't technology. It's pace.

## What's Driving Change

Policy: IRA, EU Green Deal, China's 15th FYP targets
Finance: Climate finance flowed at $1.3 trillion in 2024 — still short of $4.5T needed
Innovation: Perovskite solar cells hit 26.61% certified efficiency; flow batteries scaled to GWh level

## Explore

📚 Core Resources — Key reports, datasets, and dashboards
🔧 Climate Assessment Tools — How scientists measure and model the crisis
📖 References & Key Papers — Foundational research from IPCC, Hansen, Rogelj
📌 Further Reading — Solutions, climate justice, decarbonization politics

Bookmark this page. It's a reference, not a news feed — come back when you need context on a specific angle.