Об­ра­зуй­те от слова SCIENCE од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

The United Nations (UN) has published its prediction about the size and age of the world’s population three hundred years from now. This report can help environmental ______ and policy-⁠makers to understand dramatic changes in the world’s population in the future.