A: Hi B, it's so sunny today, with high UV rays. They're really harmful to our skin and eyes. I have to cover myself up like a ninja!
B: Yeah, you're right. People are facing global warming and climate change. What do you think causes this?
A: The main cause is human activity. Burning fossil fuels releases a lot of greenhouse gases, especially CO2.
B: How does CO2 make the Earth warmer?
A: CO2 acts like a blanket around the Earth, trapping heat from the sun and preventing it from escaping into space, which makes the planet hotter.
B: So, what should we do to reduce climate change?
A: I think we need to stop cutting down forests, reduce the use of coal and fossil fuels, and switch to renewable energy like solar, wind, or hydro power.
B: Yes, and factories should also cut down on emissions into the air.
A: I agree. Talk to you later, bye!