The most important things in life are intangible.

One of the essential differences between the liberal and conservative worldview is that the liberals believe in rationality, whereas conservative believe that human events are ordered by forces that are beyond the ability of our rational mind to understand or control.

A species may eat a particular bacterium, phytoplankton, smaller fish, or plant in an area. Lacking a predator, these species/populations will overgrow and alter the area's biology, overwhelming and driving to extinction dozens or hundreds or thousands of other local species.

The most important things in life are intangible.

In the 24 hours since this time yesterday, over 200,000 acres of rainforest have been destroyed in our world. Fully 13 million tons of toxic chemicals have been released into our environment. Over 45,000 people have died from starvation, 38,000 of them children. And more than 130 plant and animal species have been driven to extinction by the actions of humans. And all this just since yesterday.

Most people’s major life regrets are not about the things they’ve done, but about the things they’ve not done, the goals they never reached, the type of lover or friend or parent they wished they’d been but know they failed to be.

Many people I've met believe that plants are made up of soil-that the tree outside your house, for example, is mostly made from the soil in which it grew. That's a common mistake. That tree is mostly made up of one of the gases in our air (carbon dioxide) and water (hydrogen and oxygen). Trees are solidified air and sunlight.