There is a serious problem related to global warming is that in British Columbia there is a scourge of our pine trees occurring in our dry Interior of what is called a pine beetle. Since it doesn't get below about -30 degrees centigrade for 3 weeks anymore in the winter, these pests do not get killed in the winter so for probably at least 15-20 years now they have gone on the rampage and killed large swaths of our pine forests.
When the sawmills in BC saw this pine beetle-killed lumber it is so dry it creates a lot of fine dust in the mills. Due to poor control of this dust there has been two explosions in which this dust has ignited and 2 or 3 workers have been killed as a result. So in this way global warming can be deadly to human activity if extra precautions are not taken.
I believe that the answer is: Most organisms are made up of one or more cells Cell Theory was first developed in 1839 by Schleiden and Schwann, they stated that all organisms are composed of one or more cells.
