Environment

• Air pollution (introduction): What is air pollution and what causes it?
• Biofuels: Can we grow our own fuels for transportation? What are the drawbacks of doing so?
• Carbon capture and storage (CCS): Can we really make our old power plants more eco-friendly?
• Carbon offsets: Is it good to "buy" your way out of harming the planet?
• Composting toilets: How can you dispose of sewage without causing water pollution?
• Earthquakes: What causes earthquakes and why are big ones so much bigger than little ones?
• Eco-labelling: If a product claims it's eco-friendly, how can you be sure it's telling the truth?
• Electrostatic smoke precipitators: How can we scrub soot from smokestacks (chimneys)?
• Energy monitors: Which of your appliances cost most money to run?
• Environmentalism: What is environmentalism and what does it involve?
• Fair trade: Why should we care where our products come from?
• Fracking: A great way to increase our supplies of oil and gas or a major new cause of pollution?
• Geoengineering: Can we "engineer" Earth to repair the damage we're doing to its climate?
• Global warming and climate change: Is climate change really happening? What will it mean for the future?
• Greywater: How can you save water at home by storing water you've used already?
• Hydroponics: Can you really grow plants without soil? Why would you want to?
• Land pollution: How are we polluting the Earth beneath our feet?
• Organic food and farming: Are there really benefits of growing food without pesticides and chemicals?
• Passive solar energy: Is sunlight alone enough to keep your house warm?
• Plasma arc recycling: Could we get rid of trash by melting and vaporizing it?
• Renewable energy: How can we make energy in a way that doesn't use up Earth's scarce resources?
• Rivers: Where do rivers come from and why do they change as they flow to the ocean?
• Recycling: How can we reduce our impact on the planet by trashing less and reusing more?
• Water pollution: What causes water pollution and how can we stop it?

You'll find more articles on renewable energy in our list of energy articles.