Nothing can photosynthesize in the night time even if the temperature goes up. But even then temperature has nothing to do with Photosynthesis.
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities.
Global warning I'm not sure
Yes, humans are a keystone species by virtue of their technology<span> as well as the manner in which they influence their natural habitat. If humans were to become extinct, pets, </span>livestocks<span>, and crop plants would also follow. On the other hand, the species that would likely grow in number would be mountain </span>gorillas, whales and weeds. <span> </span>