They could slow down by about 50 percent.

Well, the fuel consumption is proportional to the drag force.

How can we use this?

The car consumes a lot of fuel.

So, traffic keeps flowing, so that means less braking, which means less accelerating, less gas and less pollution,

They're relieving congestion, and they're frankly starting to save some fuel.

gas money.

(Applause) So let's say the plane is 30 miles per gallon.

The United Kingdom is consuming 1.25 watts per square meter.

A lot of environmentalists who are always trying to drive us towards using less energy, because all that energy's coming from the consumption of fossil fuel.

Blame high fuel costs, blame insurance premiums, blame technology.

The global economy grows exponentially, at about 3 a year, consuming increasing amounts of non renewable fuels, minerals and metals, as well as renewable resources

So despite all sorts of experts like me flying around the planet and burning jet fuel, and politicians signing treaties in fact, you could argue the net effect of all this has been negative, because it's just consumed a lot of jet fuel.

So I took the food supply of every single country and I compared it to what was actually likely to be being consumed in each country.

Many economists believe that the free market will substitute one energy source with another through technological innovation.

NASA described conditions that year as the worst since records began.

And economic chaos in the West, at the most, or, at the very least, the grim, inevitable realization that something has to be done about the excess consumption of fossil fuels in the United States of America and other Western countries will be impressed upon people's consciousness.

Improvement of natural energy technology

Energy rating 0.95.

Rp7 rocket fuel burns at 5.000 degrees.

Let's see how far we can go by bending rules as we estimate the fuel efficiency, the miles per gallon of a 747.

We slowed down.

So we have new designs that are helping us take mechanical things that we used to spend energy on

But you're still kind of cash flow negative.

We move further.

Japan's consumption of rice is decreasing.

Marketing reduces things. Marketing simplifies.

We're looking for fuel.

Let's have our cars go at 60 miles per hour.

So today I'm going to talk to you about the rise of collaborative consumption.

I made a promise that the next time I would fly around the world, it would be with no fuel, independent from fossil energies, in order to be safe, not to be threatened by the fuel gauge.

If we started today, 10 years from now, at the end of this window of opportunity, those fuel efficient cars will reduce our fossil fuel needs by four percent.

It's about a million calories.

Now it turns out that in Alzheimer's disease, there's a huge deficit in glucose utilization in the brain.

So the truckers are just going about their business, and they're buying fuel.

Partly through this debt system, the effects of economic growth have been spectacular in GDP, damming of rivers, water use, fertiliser consumption, urban population, paper consumption, motor vehicles, communications and tourism.

Ran out of juice.

Intensive farming is depleting soils.

Fill her up.

You can make ammonia out of hydrogen, which could be a fuel.

We've talked about the soil erosion.

And I think more and more people are also asking

Then the actions have two new types of clauses.

Jet fuel.

And we're working on a bigger plane 220 foot span and an intermediate size, one with a regenerative fuel cell that can store excess energy during the day, feed it back at night, and stay up 65,000 feet for months at a time.