As an entomology student.........I think with insect
Due to warm to warmer climate, world will more favorable for insects, that has to be a positive effect on our growing population food security, when source of protein from large animal are steady or not expanded further. Specially for edible insects culture are now possible with little efforts, by means of gift of climate change.
for some groups of the plants is positive. taking an example of plants of Andes of Peru, Puya raimondii has expanded your range altitudinal and is because to temperature elevation.
For some parts in this world may be positive. e.g. cold areas DO NOT cost more energy to warm up their homes during winter. However, even more energy cost during summer. On my field, climate change increased the infectious diseases transmission in most parts world widely. Incidence of malaria, dengue and haemorrhagic fever with renal syndrome increased or re-emerging recently in South East Asia.