What do nature give's to us people?

Fresh water 

There is no physical substance humans require more than fresh water: without water we can only survive a few hellish days. While pollution and overuse have threatened many of the world's drinking water sources, nature has an old-fashioned solution, at least, to pollution. Healthy freshwater ecosystems—watersheds, wetlands, and forests—naturally clean pollution and toxins from water. Soils, microorganisms, and plant roots all play a role in filtering and recycling out pollutants with a price far cheaper than building a water filtration plant. According to research, the more biodiverse the ecosystem, the faster and more efficiently water is purified.



Seed dispersal 

Much like pollination, many of the world's plants require other species to move their seeds from the parent plant to new sprouting ground. Seeds are dispersed by an incredibly wide-variety of players: birds, bats, rodents, megafauna like elephants and tapirs, and even, researchers have recently discovered, fish. Seed dispersal is especially important for tropical forests where a majority of plants depend on animals to move.



Biodiversity and wildlife abundance

The argument to save the world's wildlife has often come from an aesthetic point of view. Many conservationists have fought to save species simply because they like a particular species.  This is often why more popularly known animals—tigers, elephants, rhinos—receive far more attention than less popular (although just as endangered) wildlife—for example, the redbelly egg frog, the smokey bat, or the bastard quiver tree. But beyond making the world a less lonely, less boring, and less beautiful place—admirable reasons in themselves—many of the services provided by biodiversity are similar to those provided by all of nature. Biodiversity produces food, fibers, wood products; it cleans water, controls agricultural pests, pollinates and disperses the world's plants; and provides recreation, such as birdwatching, gardening, diving, and ecotourism.

bioabundance is often ignored.A loss in bioabundance means that species are not just important for their diversity, but for their numbers. While Asian elephants may not go extinct any time soon, their depletion in forests means that the ecosystems lose the elephants' special ecological talents such as spreading seeds and engineering micro-habitats. The drop in salmon populations in the US has caused the entire freshwater ecosystem to receive less nutrients every year (researchers estimate a nutrient-drop of over 90 percent); this means less food for people, less salmon for predators, and a less rich river overall. Declining nutrients also makes it impossible for the salmon to rebound to optimal populations, creating a vicious circle of bio-decline.



Medicine

Nature is our greatest medicine cabinet: to date it has provided mankind with a multitude of life-saving medicines from quinine to aspirin, and from morphine to numerous cancer and HIV-fighting drugs. There is no question that additional important medications—perhaps even miracle cures—lie untapped in the world's ecosystems. In fact, researchers estimate that less than 1% of the world's known species have been fully examined for their medicinal value. However the ecosystems that have yielded some of the world's most important and promising drugs—such as rainforests, peat swamps, and coral reefs—are also among the most endangered. Preserving ecosystems and species today may benefit, or even save, millions of lives tomorrow.



Fisheries 

Humankind has turned to the rivers and seas for food for at least 40,000 years but probably even longer. Today, amid concern of a global fishery collapse, more than a billion people depend on fish as their primary source of protein, many of them among the global poor. Fisheries also provide livelihoods, both directly and indirectly, for around half a billion. Coral reefs, mangroves, and seagrass ecosystems provide nurseries for the world's fisheries, while the open ocean is used for migrating routes and hunting.