Is global warming really a threat? Yes, respond most scientists, but only recently have they been able to approach a basic agreement about changing climate. FULL STORY

• Explainer: The global warming process
• Timeline: Climate change milestones
• Watch: Report: Earth's ecosystem at risk
• Seeking solutions to a cooler planet

Some plants and animals have reacted to developments in the environment over time, but what consequences does climate change hold for the future? FULL STORY

• Flash: Hot spots around the globe
• Global warming sizzles in popular culture

The environmental debate involves many nations with different ideas, with doomsday scientific forecasts clashing with thorny political realities. FULL STORY

• Interactive: Policies on some key issues
• CNN/Money: Businesses warm up to climate change
• Greenhouse gas market aims to slow global warming

Scientists may argue over climate change, but for some, global warming is already changing their lives.

• Gallery: Climate change
• Audio Slide Show: Kivalina, Alaska | Tuvalu
• CNN Presents: Melting Point