Can someone help me answer these three questions? 1. This week, the General Assembly of the United Nations meets to discuss global issues. What is different about this year's General Assembly?

2. Some of the vaccines for coronavirus are in the final stages of being tested. What will be the challenges the companies have once a vaccine gets approved?

3. Why do leaves change color?

he General Assembly, led by its President, has been carrying out its work via novel ... Year in year out, every September, Member States have met in the General Assembly ... poverty, hunger, armed conflict and other ills remain global challenges. These challenges call for global action, and the 75th session of the General ...

Some trials will fail, and others may end without a clear result. ... Here is the status of all the vaccines that have reached trials in humans, along with ... COMBINED PHASES: One way to accelerate vaccine development is to combine phases. ... On July 27, the companies announced the launch of a Phase 2/3 trial with 30,000 ...

Chlorophyll Breaks Down

But in the fall, because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.

Explanation:

Source: Google