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Many countries have set up laws in order to protect plants. Examples of these laws are restricting land development or creating preserves. Only a few endangered species are actually protected. because they are on a lists containing the protected plants. Many more species become extinct without public notice.

plantA great concern is the rate at which species are becoming extinct within the last 150 years. While species have evolved and become extinct on a regular and natural basis for the last several hundred million years, the number of species becoming extinct since the Industrial Revolution is not natural. If this rate of extinction continues, or accelerates as now seems to be the case, the number of species becoming extinct in the next decade could raise to millions. Most people do not relate endangerment of large mammals or bird life, and some of the greatest ecological issues, to extinction of plants. But because they are the base of the food chain, plants are the foundation to stability of whole ecosystems and wild- and bird life. 

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Why do we need plants
We use plants for a number of reasons. Most important is that the provide us from fresh air.
Threats
Though we need plants, mankind isn’t very carefully to them. Plants are threatened.

News about plants

ScienceDaily: Latest Science News


Frogs, foam and fuel: Solar energy converted to sugars - In natural photosynthesis, plants take in solar energy and carbon dioxide and then convert it to oxygen and sugars. The oxygen is released to the air and the sugars are dispersed throughout the plant -- like that sweet corn we look for in the summer. Unfortunately, the allocation of light energy into products we use is not as efficient as we would like. Now engineering researchers are doing something about that.

Scarcity of phosphorus threat to global food production - Phosphorus is just as important to agriculture as water. But a lack of availability and accessibility of phosphorus is an emerging problem that threatens our capacity to feed the global population. Like nitrogen and potassium, it is a nutrient that plants take up from the soil and it is crucial to soil fertility and crop growth.