Why should we be concerned about the disappearance of phytoplankton in the oceans

Y’all i need answers plss people are saying me and my brother look alike although we’re two different ages. one year apart i’m a girl, btw i’m thinking we could be fraternal twins idk my parents and my friends think we look alike

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute

Which short-term environmental change is most likely to lead to ground shifting, landslides, and the collapse of buildings or roads? forest fires flooding earthquakes