The problem of global temperature change mainly refers to

Global warming problem.

1. Temperature rise: The average temperature of the earth's surface is rising year by year, leading to climate warming. According to scientific research, most of the temperature rise over the past century is due to human emissions of greenhouse gases.

2. Extreme weather events: Global climate change has increased the frequency and intensity of extreme weather events, such as heat waves, droughts, heavy rains, hurricanes, etc. These extreme weather events have severe impacts on humans and ecosystems.

3. Sea level rise: Global climate change causes glaciers to melt and oceans to expand, which in turn causes sea levels to rise. This can lead to inundation of coastal areas and damage to coastal ecosystems.

4. Biodiversity loss: Climate change has had a negative impact on biodiversity. Environmental changes caused by climate change can lead to species extinction, habitat loss and ecosystem collapse.

The issue of global climate change has attracted widespread attention and discussion from the international community. The international community is committed to reducing greenhouse gas emissions, adapting to climate change and improving global disaster reduction capabilities through international frameworks and agreements, such as the United Nations Framework Convention on Climate Change and the Paris Agreement.

Causes of global climate change

1. Natural factors

1. Solar activity: Changes in solar activity will have an impact on the earth's climate. Irregularities in the sunspot activity cycle can lead to changes in the amount of solar radiation the Earth receives.

2. Volcanic eruptions: Volcanic eruptions release large amounts of gas, dust and particulate matter, which can block solar radiation and cause the earth's surface temperature to drop.

3. Changes in natural systems: Changes in the natural systems themselves, such as changes in ocean circulation, monsoons, glaciers and forests, will have an impact on the global climate.

2. Human factors

1. Greenhouse gas emissions: Human activities are mainly in industry, transportation, energy production, agriculture and other industries, which emit a large amount of greenhouse gases, especially carbon dioxide ( CO2), methane (CH4) and nitrous oxide (N2O). These gases accumulate in the atmosphere and form a greenhouse effect, causing the earth's temperature to rise.

2. Destruction of forests and ecosystems: Large-scale deforestation, land reclamation and ecosystem destruction have resulted in the release of large amounts of carbon dioxide. Forests are an important factor in absorbing carbon dioxide and releasing oxygen; when forests are destroyed, the ability to absorb carbon dioxide is reduced, further leading to global climate change.

3. High-efficiency mobile use of fossil fuels: Extensive use of fossil fuels (such as coal, oil, and natural gas) to meet energy needs releases large amounts of greenhouse gases.

Greenhouse gases emitted by human activities are the main cause of increased global climate change. Reducing greenhouse gas emissions and adopting adaptive measures are key to combating global climate change. This requires global cooperation and effective emission reduction measures, including the promotion of renewable energy, energy efficiency improvements, ecosystem protection and sustainable agriculture.