Deforestation is the biggest cause of environmental harm, releasing billions of tons of greenhouse gases into the atmosphere each year as over 200,000 square kilometers of forests are destroyed annually, often by burning the trees to make way for farms. Greenhouse gases like CO2 released by burning fossil fuels and forests trap heat from the sun, gradually warming the planet and causing problems like floods, droughts, fires, and melting ice. Individual actions like planting trees, reducing car use in favor of biking, and adopting a reduce, reuse, recycle mindset can help address these issues.