I’ve spent the past few years in Silicon Valley, where tech firms are trying to turn the fortunes of their most promising businesses into profits.

A lot of this has been accomplished by selling cars, which are by far the most profitable industry in the world.

Cars are the fastest-growing segment of the US economy.

They make up almost half of the total value of goods and services produced in the US.

Most car companies have been founded by young men or women, who have never previously worked in the manufacturing industry.

They’ve been hired by wealthy investors to build their companies into powerful companies.

In some cases, their stock price has tripled in the past year alone.

But the success of these companies, and the companies they’ve built around them, is largely due to the fact that the cars they sell are actually cheaper than they used to be.

They have a better fuel economy, more comfortable seats, a cleaner interior, and are more environmentally friendly.

In fact, a good car used to cost $30,000 to $60,000 in 2015, compared to around $70,000 today.

There are other reasons to drive less, too.

The average US household spends about $100,000 a year on transportation, according to the US Census Bureau.

If you drive fewer miles, you’ll save more money.

And in some places, such as California and Texas, the cost of driving has dropped dramatically.

And, of course, there are many factors at play in the economics of driving, such a car company may have a huge incentive to get a new car in the next year or two, because it will get a discount on its costs.

But there’s also a deeper reason: People are increasingly aware of the impact of pollution and climate change.

In many parts of the world, pollution is the second biggest driver of death and disability, and it is expected to grow to become the third biggest driver in 2050.

The United States has a long history of driving with a high carbon footprint.

The nation’s population is projected to grow by an estimated 9 million people by 2050.

Driving is one of the largest ways Americans are expected to reduce emissions.

A 2015 study by the University of Michigan found that driving a car every day saved an average of $10,000 per year.

In addition, if you drive less than 30 miles a week, you can save up to $10 a day per car, per car.

But cars are expensive to run, and some people may not be willing to pay that kind of money.

The companies that sell cars have made it possible for people to drive a much less polluting vehicle than they would have in the future, by selling an electric or fuel-efficient vehicle.

The cars have also been designed with many of the features that make them expensive and environmentally friendly: They are quieter than gas-guzzling cars, they don’t need to be plugged in, they can be driven for longer periods of time, and they’re not prone to overheating.

But as we’ve seen over the past decade, this is only the beginning.

And as cars become more popular, they’re going to have to become even more efficient, as demand for these vehicles increases.

What to do about pollution and global warming: How to cut emissions in the long run | More on pollution and greenhouse gases How to reduce pollution and save money in the short term | More climate change stories This is part of Newsweek’s ‘What’s Driving the World’ series.