Every little thing you do really makes a difference! There are classes and clubs focused on various social problems. 【小题1】One cause that has been popular in recent years is helping the environment and preserving our resources. There are several ways that you can help protect this planet we call Earth. Using reusable bags is one of those vital ways to protect the world's resources.

Plastic grocery-type bags that get thrown out end up in landfills or in other parts of the environment. These can make animals stuck in them or mistake them for food.【小题2】

Whether you are shopping for food, clothes or books, use a reusable bag. This cuts down on rubbish and prevents animals from getting a hold of them. There are even some stores that offer discounts for using reusable bags! 【小题3】I have heard of people using reusable bags when they move!

If you forget your reusable bags at home, buy a new one. 【小题4】Just make sure you remember to put them there and never leave home without them!

If you are in a position where you need to use the plastic bags, reuse them next time you go shopping, or use them for something else. Just do not be so quick to throw them out!

There are some states that are outlawing(宣布……不合法）or charging extra for using plastic bags. 【小题5】

Say No to Non-electric Cars

Most modern cities have taken action to reduce traffic jams and improve air quality. But if they want to become more livable, they should think about more ambitious goals.

Amsterdam has set a good example. As from 2030, driving a gas vehicle there will not be allowed. The Dutch capital wants its citizens to become healthier and happier.【小题1】Amsterdam isn’t alone; it joins Hamburg, Madrid and other cities in moving toward at least partial car bans to reduce pollution.

The advantages of such plans are clear. 【小题2】It slows economic growth. Pollution from cars not only contributes to climate change but is also a threat to well-being. Amsterdam’s government says it reduces life expectancy of its citizens by a full year.

【小题3】 Electric cars, after all, are more expensive. And for most people, giving up driving means life will become less convenient. Perhaps cities can help make this switch easier. For example, they can think about improving public transportation. They can also design appealing public spaces for pedestrians (行人). 【小题4】 Technology can also do its part. Cities can be more open to new ways of getting around, such as bike-sharing, driverless cars and delivery drones(无人机).

Saying no to non-electric cars or even all cars is hard. 【小题5】 Making our cities more livable has to become an urgent goal.

As people travelling by air become increasingly aware of their carbon footprint, flying has become not only one of the most polluting industries, but also one with the most potential to turn things around.

After Solar Impulse 2 completed the world’s first flight by a solar-powered aircraft in 2016, airlines and aircraft producers looked to become the first to provide a commercial plane. Bertrand Piccard, one of the pilots responsible for Solar Impulse 2’s journey said, “All the clean technologies we’ve already had can be used everywhere. We have to use them, not only for the environment, but also because they are profitable and able to create jobs.”

The following year saw many projects in the aviation (航空) field as the airline industry acknowledged the future of low- carbon transportation methods. In 2017, Zunum Aero, a small aviation company which focused on delivering a range of hybrid-electric (混合电动的) planes received financial aid from JetBlue and Boeing, whilst EasyJet teamed up with Wright Electric to develop battery-powered aircraft and NASA also announced its plans to develop its own electric aircraft.

Orkney Islands, lying about 20 miles north of the Scottish mainland, are rich in renewable resources, especially the wind energy. Loganair, a Scottish airline, is cooperating with aviation companies to make Orkney the world’s first fully electric airline routes. However, this is never easy. Due to the limited size and weight of a battery that an airplane can carry, airplane producers are faced with a bottleneck — the continued power supply for electric airplanes. They believe the abundant wind energy in Orkney could be the key to solving it.

The benefits of electric air travel transcend its low-carbon emissions. Aviation experts believe these aircraft’s power source will also mean they will be less noisy, smaller, require less maintenance costs, and need a shorter runway to take off and land — this could lead to more airports in small cities and more rural areas being connected to the world at large.