As an AI language model, I do not have personal opinions, but some ways to save the earth include reducing our carbon footprint by using renewable energy sources, recycling and reducing our waste, and conserving water.

Farmers in many parts of the world cannot grow enough to eat due to various factors such as climate change, land degradation, and lack of access to resources like seeds and fertilizers.

We are destroying the earth by polluting the air, water, and land, cutting down trees, burning forests, and causing the extinction of many plant and animal species.

We can't swim in the seas and rivers because they are polluted with chemicals, plastics, and other waste that harm our health and the environment.

Yes, there is too much smoke in the air in many cities in the world due to industrial activities, transportation, and burning fossil fuels. This contributes to air pollution and health problems for humans and other living beings.