Plants, and the insects which rely on them, are the living foundations of our planet. But these foundations are under stress because we have a tendency to replace fields and forests with decorative trees and shrubs imported from around the world. Adding to the problem, our obsession (痴迷) with perfection leads us to use a lot of pesticides (杀虫剂).
These actions are part of the reason global biodiversity is crashing. There are over three billion fewer wild birds in North America than there were in 1970. Recent research shows that insect numbers, even in nature reserves, have fallen, and 40 percent of all insect species may be extinct within a few decades. This is discouraging news; however, there are actions we can take to help bring at least some species back.
The first step is to redefine our concept of "garden" to include more than just plants. We need to intentionally share our space, and not just with the birds, bees and butterflies that visit our flowers, but also with the little insects that may eat a part (very rarely all) of our plants. Therefore, we must limit pesticide use. It's crucial to support nature's recovery, and it's much better for everyone: no doctor has ever recommended long-term exposure to pesticides.
Many drought-tolerant plants brought in from across the planet are being passed off as ecofriendly. However, mostly they're not. Yes, you're saving water, but these foreign plants can become disasters when they escape our yards. Helping the environment can be about more than saving water. Even in drier areas, like the American West, the selection of attractive native plants to choose from is vast. If dry is your style, there are native wildflowers, flowering bushes and trees that allow you to save water and nature.
Xeriscapes (节水型园艺) leave many gardeners thirsting for green, and there's an important alternative that has been largely ignored. For those disenchanted with dry landscaping, using underappreciated and water-loving native plants to make your garden a real-life oasis (绿洲) could be lifesaving to wildlife. In nature, this unsung group of native plants is limited to riparian zones, the narrow belts of green along water bodies, but if consumers demand them, nurseries will increasingly carry these riparian species, and the presence of such plants in the garden will provide for many animals including not just butterflies and their relatives but also colorful birds.
The ideal garden would offer a combination of drought-tolerant native plants and a few species that need a little more water, providing options for little guests and the bigger ones that will come to eat them. As more creatures stop by to share our yards, we will be making nature, and us all, a little healthier.
CP: Central Point P: Point Sp: Sub-point C: Conclusion
B . 
C . 
D . 
