1. Why would the earth be barren without atmosphere ?
2. Why are human beings the most important part of human environment?
3. Our environment consist of all living and nonliving components around us. But due to unplanned use of technology, we are polluting the environment and thereby causing harm to it. Is it justified why or why not
Answers
1.The molecules in the upper layers of the atmosphere become excited as energy from the Sun hits the Earth. ... The atmosphere also protects us from the vacuum and cold of space. Without our atmosphere, the Earth would be as barren and dead as the Moon or Mercury.
There are a number of different things that make humans different from other creatures. Human beings adapt themselves to the natural environment by making modifications in their food, cloth and shelter. They also modify their natural environment to suit their social, biological, cultural and economic needs.
2.The early human beings slept on trees and caves, they used to roam around in search of food as that of other creatures but with the passage of time, with the help of their mind, thinking skills, ability, knowledge, hard work, etc. they have changed themselves drastically. Now, the modern man is far more organized, skilled, well mannered and cultured. They live in houses, eat cooked food, travel from one place to another by various means of transportation, etc.
3.The world contains a wide diversity of physical conditions, which creates a variety of environments where living things can be found. In all these environments, organisms interact and use available resources, such as food, space, light, heat, water, air, and shelter. Each population of organisms, and the individuals within it, interact in specific ways that are limited by and can benefit from other organisms.
Interactions between different organisms are numerous and are usually described according to their positive (beneficial), negative or neutral effect on others.
The interactions between living things and their non living environment makes up a total ecosystem; understanding any one part of it requires knowledge of how that part interacts with the others.
Ecosystems do not ‘collapse’ but do change in function, structure and composition over time due to natural or human disturbance (examples include the impact of drought, flooding, mowing and herbicides).