Answer: Burning fossil fuels, cars, remembering the forest.
Step-by-step explanation:
These are all human activities that are the biggest factors of global warming. Climate change has been going on for more than a hundred years, and the planet is heating up more and more every year. Climate change is reflected through droughts, hurricanes, and floods. The single largest polluter in the world is China, which emits twice as many harmful gases into the atmosphere as the European Union, for example. This is primarily the result of consuming large amounts of coal during industrial production. Cars, coal, and other fossil fuels emit large amounts of harmful gases that remain in the atmosphere and damage the entire environment. Forests are the largest producers of oxygen on the planet earth. By constantly remembering, we reduce the amount of newly produced oxygen.