5 . Vehicles on our roads are now mostly petrol and diesel (柴油) cars, but their days cannot continue for much longer. A recent university study found that current electric cars could be used for 87 percent of daily car journeys in the US. That figure could rise to 98 percent by 2020.

One hurdle to the widespread adoption of electric cars has been “range anxiety” — drivers concerns about running out of electricity on a journey. While petrol stations are conveniently located across national road systems, the necessary network of electric charging stations is still being developed. That said, charging points are becoming increasingly common throughout the USA.

Attitudes towards electric vehicles have changed greatly over the last few years. Not that long ago, electric cars were met with distrust, and their high prices drove customers away. Thanks to improvements in battery capacity, recharging times, performance and price, the current generation of electric cars are starting to persuade picky consumers. Plug-in cars will soon give internal combustion engine (内燃机) models a run for their money.

As well as development on the road, electric vehicles are taking to the seas and skies. Electric boats are among the oldest methods of electric travel, having enjoyed several decades of popularity from the late 19th to the early 20th century before petrol-powered outboard motors took over. Now, the global drive for renewable energy sources is bringing electric boats back. Steps towards electric air travel are also being made, with Airbus and NASA among the organizations developing and testing battery-powered planes. The experiments could soon make commercial electric flight a reality.

Electric vehicles do not produce any emissions (排放). If the US could replace 87 percent of its cars with electric vehicles, it would reduce the national demand for petrol by 61 percent. However, because of the production processes and the generation of electricity required to charge these vehicles, they cannot claim (声称) to be completely emission-free. That said, as many countries continue to increase their use of renewable energy sources, electric vehicles will become even cleaner.

6 . London and Paris are two of Europe’s biggest tourist destinations, just a few hours away from each other by road or rail and an hour’s distance by air. What about the train-ferry combination that many recall fondly from their childhoods? Well, though it’s budget-saving, this option is too time-consuming today, so better leave it to your memories. Since the UK is not part the Schengen Area, passengers need to go through passport control prior to boarding.

Air trips

Though flying between London and Paris is by no means recommended, there are still a few people traveling between the two dynamic cities by air. A very low one-way fare is possible through advanced booking, but of course it’s rare, and that doesn’t include the taxi and rail fares traveling to and from the airports.

* One-way fares from Paris can be as low as 49;

* From London, Air France flies with fares as low as £39(46), and British Airways as low as £48 (56).

Rail trips

The only direct train between London and Paris is the Eurostar, which travels 15 -17 times per weekday. Eurostar’s 2015 edition trains can make the journey in two hours at speeds of up to 320 km/h. Besides, they offer good seating space.

* Fares begin at a reasonable £58(68), round trip;

* The earlier you book, the more you save.

Bus trips

The bus is by far the least expensive and longest way to travel between Paris and London. Eurolines and OUIBUS are two major bus lines traveling between the two capitals. The journey takes between seven and nine hours. Both lines advertise free Wi-Fi.

* One-way Eurolines fares begin at 15;

* One-way OUIBUS fares begin at 15 too, but early bird sales can even lower the fare.

9 . I was driving from Harrisburg last night, a distance of about eighty miles. It was late. Several times I got stuck behind a slow-moving truck on a narrow road with a solid white line on my left, and I was clinching(紧握) my fists with impatience.

At one point along an open highway, I came to a crossing with a traffic light. I was alone on the road by now, but as I approached the light, it turned red and I braked to stop. I looked left, right and behind me. Nothing. Not a car, no suggestion of headlights, but there I sat, waiting for the light to change, the only human being for at least a mile in any direction.

I started wondering why I refused to run the light. I was not afraid of being arrested, because there were clearly no police around, and there certainly would have been no danger in going through it.

Much later that night, the question of why I'd stopped for that light came back to me. I think I stopped because it's part of an agreement we have with each other.It's not only the law, but it's an agreement we have, and we trust each other to honor it: we don't go through red lights.

It's amazing that we ever trust each other to do the right thing, isn't it? And we do. Trust is our first tendency. We have to make a deliberate decision to mistrust someone or to be suspicious or skeptical. Those attitudes don't come naturally to us.

It's a very good thing too，because the whole structure of our society depends on mutual trust, not distrust. This whole thing around us would fall apart if we didn't trust each other most of the time. We do what we say we'll do; we show up when we say we'll show up；we deliver when we say we'll deliver; and we pay when we say we'll pay. We trust each other in these matters, and when we don't do what we've promised, it's far from the normal. It happens often that we don't act in good faith and in a trustworthy manner, but we still consider it unusual, and we're angry or disappointed with those badly-behaved people. Anyway I was so proud of myself for stopping for the red light that night.

10 . Drive in Ontario

Welcome to Ontario! Here’s what you need to know if you are, or will be, visiting Ontario — and want to drive while you’re here.

If you are visiting Ontario for less than 3 months and want to drive while you’re here, you can use a valid driver’s license from your own province, state or country.

If you will be visiting from another country for more than 3 months, you will need an International Driver’s Permit (IDP) from your own country. This is a special license that allows motorists to drive internationally when accompanied by a valid driver’s license from their country. You need to have this permit with you when you arrive in Ontario. You cannot apply for one once you are here.

As a visitor, you are responsible for knowing Ontario traffic laws. Here are just some:

● keep to the right of the road

● obey posted speed limits (e.g. 50 km/hour)

● do not use handheld devices while driving (e.g. cell phones, tablets or music players)

● slow down and pull to the right, if an emergency vehicle is driving behind you with their lights and sirens (e.g. an ambulance, fire truck or police car)

If you break a traffic law, you will face a penalty. Penalties range from fines to making your license invalid or your car taken away. For more information, please click here.