Human activities now cause land erosion and soil movement annually that exceed all natural processes. Air and water pollution caused by human activities affect the condition of the atmosphere and of rivers and lakes, with damaging effects on other species and on human health.
Over time, many farming practices lead to the loss of soil. All over the world, farmers clear trees and other plants and plow up the soil to plant crops. Without its natural plant cover, the soil is more exposed to rain and wind and is therefore more likely to get washed or blown away.
The four common Planet Surface Processes are: Cratering, Volcanoes, Erosion, and Weathering (chemical and physical).
Fast changes occur through the actions of earthquakes, volcanoes, landslides, etc. while slow change takes time and has a process. The focus of this article is the slow change since its action is carried out on all parts of the Earth's surface.
Falling ice, rocks and gushing water wear away at the mountain slopes. Temperature changes thaw out and refreeze the ice in rock fissures, wedging them apart, whilst thermal expansion and contraction disintegrates exposed rock surfaces. Rock falls and ice avalanches scour mountain sides, further eroding the slopes.
Many human activities increase the rate at which natural processes, such as weathering and erosion, shape the landscape. The cutting of forests exposes more soil to wind and water erosion. Pollution such as acid rain often speeds up the weathering, or breakdown, of the Earths rocky surface.
For thousands of years, humans have modified the physical environment by clearing land for agriculture or damming streams to store and divert water. As we industrialized, we built factories and power plants. For example, when a dam is built, less water flows downstream.
How is Earth's surface most likely to change in a place that has extensive tree growth? Top soil will be carried away by wind and water. Cracks in rocks will deepen as the roots grow. Big furrows will form due to increase in rainfall.
There is substantial evidence that human activities, especially burning fossil fuels, are leading to increased levels of carbon dioxide and other greenhouse gases in the atmosphere, which in turn amplify the natural greenhouse effect, causing the temperature of the Earth's atmosphere, ocean and land surface to increase
Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels, cutting down rainforests and farming livestock. This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming.
They found four key changes: the unprecedented homogenization of species around the world through human-instigated species invasions; the growing interaction between the biosphere - the sum of all Earth's ecosystems - and technology; the total domination of one species on land and water; and human impact on evolution
To predict future climate, scientists use computer programs called climate models to understand how our planet is changing. They allow scientists to study how different factors interact to influence a region's climate. Scientists use computer programs called climate models to understand how our planet is changing.
At first, the Earth was not even able to support life. There was no oxygen in the atmosphere, and Earth's surface was extremely hot. Slowly, over millions of years, the Earth changed so that plants and animals could begin to grow. Living things then changed the Earth even more.
The action of erosion can create an array of coastal landscape features. For example, erosion can bore holes that form caves. When water breaks through the back of the cave, it can create an arch. The continual pounding of waves can cause the top of the arch to fall, leaving nothing but rock columns called sea stacks.
Weathering is the breaking down or dissolving of rocks and minerals on Earths surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Weathering and erosion constantly change the rocky landscape of Earth. Weathering wears away exposed surfaces over time.
Rock near the surface of Earth is so cold and at such low pressures that it cannot flow like mantle rock. So at the top of the asthenosphere, the hot rock flows along the bottom of the lithosphere, transferring its heat to the cold rocks by conduction. The heat then flows through to the surface, again by conduction.
Earth's surface provides all living things—including people—with everything they need for survival. People collect materials such as rocks, metals, and wood from Earth's surface to build homes and to make all the things we use every day. Plants grow in the soil and supply people and other animals with nourishment.
Humans affect the environment in positive and negative ways. Protecting endangered species and cleaning lakes and seas has a positive effect on the environment. At home you can help the planet by recycling waste and growing plants or vegetables.
Ten Simple Things You Can Do to Help Protect the Earth
- Reduce, reuse, and recycle. Cut down on what you throw away.
- Volunteer. Volunteer for cleanups in your community.
- Educate.
- Conserve water.
- Choose sustainable.
- Shop wisely.
- Use long-lasting light bulbs.
- Plant a tree.
