Every topic you asked is explained in nearly 150 words simultaneously below

Ecofeminism - It is the branch of feminism ,that Deals with environmentalism and the relationship between women and the earth as it is Foundational to its analysis and practices
Agenda 21 - agenda 21 is all about the sustainable development ,it is a non binding action plan of the united nations. It is the product of earth summit which is held in Rio de Janeiro ,Brazil 1992.

Global warming -  It is the rise in average temperature of the earth climate system because of the humans ,it is demonstrated by the temperature measurements of various effects of the warming
Hazardous wastes - It is that waste that has substantial or potential threats to public health or to the our surrounding or environment .