Carbon dioxide is the primary greenhouse gas responsible for human-caused climate change. It is released into the atmosphere through human activities such as burning fossil fuels, deforestation, and cement production.

Global warming refers to the gradual increase in the average temperature of the Earth's atmosphere and oceans. It is caused by the accumulation of greenhouse gases in the atmosphere, which trap heat and cause the planet to warm.

Motor vehicles, industrial activities, and power plants are all major sources of air pollution. They release harmful pollutants into the atmosphere, such as particulate matter, nitrogen oxides, and sulfur dioxide.

Water pollution refers to the process by which water becomes contaminated with harmful substances. These substances can include chemicals, bacteria, and other pollutants that can make the water unsafe for drinking, swimming, or other uses.

An earthquake is a natural disaster that is associated with the sudden release of energy in the Earth's crust. It can cause shaking, ground displacement, and damage to buildings and infrastructure.

Erosion is the process by which the Earth's surface is worn away by the action of wind, water, and ice. It can cause the loss of soil, damage to infrastructure, and changes in the landscape.

Solar energy, wind energy, and hydropower are all renewable energy sources. They are derived from natural resources that are replenished over time, such as sunlight, wind, and water.

Photosynthesis is the process by which plants convert sunlight into energy. It is a vital process for life on Earth, as it provides the food and oxygen that all living things need to survive.

Carbon dioxide, methane, and nitrous oxide are all greenhouse gases. They trap heat in the Earth's atmosphere, causing the planet to warm.

Evaporation is the process by which water evaporates from the Earth's surface and condenses in the atmosphere. It is a key part of the water cycle, which is essential for life on Earth.

Fossil fuels, such as coal, oil, and natural gas, are non-renewable energy sources. They are formed from the remains of ancient plants and animals and take millions of years to form.

Transpiration is the process by which plants lose water vapor through their leaves. It is a key part of the water cycle, which is essential for life on Earth.

Agriculture, logging, and mining are all major causes of deforestation. These activities involve the clearing of forests for various purposes, such as farming, timber production, and mineral extraction.

Weathering is the process by which rocks and minerals are broken down into smaller pieces. It can be caused by a variety of factors, such as wind, water, ice, and temperature changes.

Motor vehicles, industrial activities, and power plants are all major causes of air pollution in cities. They release harmful pollutants into the atmosphere, such as particulate matter, nitrogen oxides, and sulfur dioxide.