Two events in the history of the world greatly changed the Earth's environment: the Columbian Exchange and the Industrial Revolution.
The Industrial Revolution started in Europe in the late 1700s. The Industrial Revolution changed the world by creating machines and factories. This caused many changes, including urbanization (the growth of cities) and pollution. Urbanization caused cities to grow faster than at any other time. This is a process that continues to this day.
Climate change can lead to more severe weather, the growth of deserts, rising sea levels and the spread of disease. Countries have attempted to deal with climate change by signing treaties, such as the Paris Climate Agreement and turning to more environmentally-friendly sources of energy, such as solar power.
Take a look at the following charts, highlighting some of the environmental problems facing the world today.