After the start of the Industrial Revolution, the burning of fossil fuels (coal, oil, natural gas) has become larger and larger, increasing the concentration of carbon dioxide in the atmosphere. At the same time, forest fires caused by lightning, insect pests, deforestation, grassland decline and forest damage have also caused Green plants that can absorb carbon dioxide have been destroyed. Therefore, to control global warming, we must change the energy structure and vigorously plant trees. Some scientists have pointed out that only the use of nuclear fuels instead of fossil fuels can fundamentally prevent the increase of the greenhouse effect. What does this text mean? ['Exploring the main causes of global warming.', 'Emphasis on the key role of nuclear energy in preventing the aggravation of the greenhouse effect.', 'Elucidating the huge dangers of rising carbon dioxide levels in the atmosphere.', 'Call on people to change their energy mix and vigorously plant trees.']