1 . If you are a dog owner looking to add a new cat to your home, it's important that you strategize how you will introduce the two species to each other in your household. The_________thing you want is continual fighting between your pets.

The good news is that there is an effective way to make sure both of them ___________. The American Kennel Club offers pet owners the right way to introduce your cat and dog to each other with the following_________.Keep the cat and dog _________ for the first few days. It's best to get your new cat adapt to its new home by having it live in a room with the door closed. Make sure you provide it with a litter box, water and food so the cat does not need to___________ the room.

Your dog will know there's a___________ smell in the house. Let the dog sniff (嗅) near the door of the room with the _________, so he gets used to the smell. You can also let your cat sniff one of your dog's toys so it becomes _________ with him.

After a few days, let your dog stay in the room with the cat. When doing so, leave the door open, and make sure that it is after your dog has exercised as he will be_________ . If the dog doesn't seem to behave around the cat, turn to some basic__________commands in the presence of the cat. Giving your dog some food as a __________for appropriate behavior in the presence of the cat will provide an encouragement for him to continue acting appropriately.

Always make sure the cat has a way to run away from the dog. Having a(n)__________space the dog can't reach but the cat can easily get to, such as a table, is important for precautionary (预防的) reasons. Until the cat and dog are__________ with each other, supervise their interactions and continue to provide safe spots for the cat to escape.

Time for a clean-up

You are probably aware of the term “forever chemicals”, if not entirely clear on the specifics. What they are is a class of around 16, 000 artificial compounds called PFAS that break down very slowly, if at all in the environment and our bodies. They are extremely useful, but also a potential     1     to wildlife and human health. After more than 80 years of     2     and often unlimited use, PFAS pollution is more or less everywhere, from the soil on our farms to the rain that waters them. In all likelihood, you have a(n)     3     amount of these chemicals in your body.

A growing body of research has     4     exposure to some types of PFAS to harmful effects, such as kidney disease, immune dysfunction and certain types of cancer. Just a few parts per trillion of some forms accumulated over time is enough to be damaging. Moreover, exposure is more or less     5    . Skipping greaseproof (防油的) packaging or filtering tap water may limit acute exposure, but there are many other pollution     6    . In any case, for most of us, it is already too late.

How did we let it come to this? To some extent, society is reaping what it     7     by permitting so many novel chemicals to be released without a proper system to test their safety first. That has to change, and not just for PFAS. Time and again we find, too late, that industrial chemicals are harmful—as now seems the case with those in some climbing shoes—while     8     the firms that make them to carry on business as usual. There is nothing illegal in that. Nevertheless, the PFAS industry has been extremely     9    . There is good evidence that some producers have known for decades that the chemicals could cause harm, but actively confuse that knowledge. As the science of PFAS advances, there is     10     that they can be replaced, as well as rounded up (聚集) from the environment and destroyed.

9 . LONDON (Reuters) — Quiet place — Britain’s Queen Elizabeth is preparing to have her swans counted.

Buckingham Palace has announced that the annual Swan Upping, a tradition dating back to the 12th century which involves a census (审查) of the swan population on the River Thames, will be conducted by the Queen’s official Swan Marker from July 20 to 24.

“With the assistance of the Queen’s Swan Warden, Professor Christopher Perrins of the University of Oxford, the swans and young cygnets (小天鹅) are also assessed for any signs of injury or disease,” Buckingham Palace said in announcing the count.

The process involves the Swan Marker, David Barber, rowing up the Thames for five days with the Swan Warden in traditional skiffs while wearing special scarlet uniforms and counting, weighing and measuring swans and cygnets.

It may seem odd, but it is very important to the Queen. According to custom, Britain’s sovereign owns all unmarked, mute swans in open water, but the Queen now exercises the right only on stretches of the Thames and its nearby tributaries.

In medieval times, the Swan Marker would not only travel up the river counting the swans, but would catch as many as possible as they were sought after for banquets and feasts.

This year, the Swan Marker and the Swan Warden are particularly keen to discover how much damage is being caused to swans and cygnets by attacks from dogs and from discarded fishing tackle (渔具).

It is also an important year because Queen Elizabeth has decided to join her team of Swan Uppers for part of the census. She will follow them up the river and visit a local school project on the whole subject of swans, cygnets and the Thames.

“Education and conservation are essential to the role of Swan Upping and the involvement of school children is always a rewarding experience,” Buckingham Palace said.

Light the Cities of the Future

A previously unlit cycle path in the Netherlands has recently drawn our attention. It has been resurfaced with a material that consists of thousands of shining stones in order to create a well-lit route. The Van Gogh Path, so called after the artist who lived in the town of Nuenen in 1883, combines the traditional with the contemporary in a gesture that acknowledge ledges Van Gingh’ masterpiece The Starry Night, but also shows the way ahead for city lighting. The Van Gogh Path is not a single case; it is not difficult to foresee a time when natural materials could help light the cities of the future.

Why should we care about city lighting? What’s wrong with current electrical city lighting anyway? Well, the problem that it causes is two-fold. First, of course, electrical lighting in most cities comes from non-renewable resources. According to the International Energy Agency, almost 20% of global electricity is consumed for lighting, which is responsible for high levels of carbon emissions. But there’s also the belief that electrical light itself is a form of pollution by destroying our view of the night sky.

From the above reasons, then, it seems wise to investigate other approaches. The city of Glasgow is attempting to use intelligent street lighting to monitor how citizens interact with the urban landscape and minimize electrical consumption and thus emissions. This “Smart City approach” is seen by many as the way of the future, but some designers aren’t convinced. They are pioneering the altogether more original approach of using materials from the natural world in order to replace electrical light entirely. They believe that this new “technology” can one day completely replace microchips and digital systems as we find better ways of making use of the light-producing mechanisms (制) that already exist in the natural world.