Give an example of the impact of human activities on the climate (one side will do)

Mainly the greenhouse effect and the heat island effect.

The greenhouse effect (mainly carbon dioxide and methane) includes the following main influencing factors: greenhouse gases produced by the combustion of coal, oil and natural gas; In addition, carbon dioxide produced by human activities and greenhouse gases produced by aquaculture. Many countries have put forward that slash-and-burn has obvious influence on climate, and the main way is greenhouse gas.

Heat island effect (the temperature near the city is obviously higher than the speed of global warming, while the heat island effect in big cities is obviously higher than that in small cities, and there is no obvious heat island effect in rural areas, which can also be called heat pollution)

The above two items are the most important.

However, the damage of human beings to the ecological environment, such as the impact on atmospheric ozone, deforestation and even the man-made impact on the weather, is not obvious, or the impact is obviously weaker than the greenhouse effect and the heat island effect.