1. In recent years damns and multi-purpose projects have came under a great opposition because of- the following reasons-
i. Regulating and damning of rivers affect their natural flow, which causes excess of sedimentation. This results in poor habitat for aquatic life.
ii. Damns also fragment or make parts of rivers which makes the migration of aquatic animals difficult.
iii. The reservoirs that are built on the existing vegetation and soil leading to it's decomposition over time.
2. Travels which conserves environment and improve the well-being of the local people is called Eco-tourism. This is also called responsible tourism. It is called so, because it puts responsibility on tourists to conserve environment.
3. Tarun Bhagat Singh group is a group which is related to water management and conservation.
4. Biogeochemicals are the chemicals and elements like oxygen nitrogen, etc. But because of pollution by factories and vehicles these biogeochemicles are unbalanced.
5. Cultural environment- Man has evolved by the time and has made progress. We used natural components and made many changes in the environment. Human settlements, roads, farmlands, damns, and many other things are included in cultural environment.
6. Ecosystem is the interaction between animals and plants. The branch of science that studies ecosystem is called Ecology. The scientists which study ecology are called ecologists.
7. There are four type of people in the ecosystem.
1. Producer- The plants are the producers ad they don't consume anything from other animals. E.g.- Plants.
2. Primary consumers- Most of the primary consumers are herbivores and eat only plants. E.g.- Deer
3. Secondary consumers- The secondary consumers eat the small primary consumers. E.g.- Snake
4. Tertiary consumers- These are the animals which eat the primary and the secondary consumers. E.g.- Orcas.
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