求翻译：世界自然基金会“2004年地球生存环境”报告指出，从1970年至2000年，由于人类对食物、纤维、能源及水需求的不断增加，造成海洋及陆地物种总量下降了30%，50%的淡水生物发生退化。是什么意思？

WWF 'living environment of the Earth 2004, "the report pointed out that from 1970 to 2000, due to human food, fiber, energy and water demand increases, the total amount of marine and terrestrial species declined by 30%, 50% freshwater biological degradation.

World Wide Fund For Nature (WWF) "2004 report noted that " the Earth environment from 1970 to 2000, due to human for food, fiber, energy and water, the ever-increasing demand total marine and terrestrial species fell by 30 per cent, 50 per cent of the freshwater biological degradation.

The world natural foundation “in 2004 the Earth survival environment” the report pointed out that, from 1970 to 2000, as a result of the humanity to food, the textile fiber, the energy and the water demand unceasing increase, created the sea and the land species total quantity drops 30%,50% fresh wa

The World Wide Fund for nature "2004 Earth environment" report indicates that from 1970 to 2000, due to humans for food, fiber, energy and water needs continue to increase, fell 30%,50% the total marine and terrestrial species of freshwater degradation occurs.

WWF 'living environment of the Earth 2004, "the report pointed out that from 1970 to 2000, due to human food, fiber, energy and water demand increases, the total amount of marine and terrestrial species declined by 30%, 50% freshwater biological degradation.