Many college students want to look for seasonal, short-term or part-time jobs to get extra cash, to stay busy or to get working experience.

The job is a great opportunity to build your fitness, keep people safe and be outdoors to enjoy some fun on the beach in the sun. The average hourly wage for lifeguards is $ 9.31, but those with certifications or previous experience may be able to earn a bit more.

Students can find plenty of positions as parents scramble (争抢) to arrange activities and find care for their children. Students who enjoy spending time with kids, staying active and being outdoors can spend their leisure time making money without even feeling like they’re working. Nannies make $ 14.56 per hour.

Students who enjoy spending their time with children, being a leader and monitoring fun outdoor activities are perfect for camp consultant positions. The average hourly wage for camp consultants is $9.28, but those with many years’ experience or specific academic backgrounds may be able to earn more.

Although it may not seem like the most attractive way to spend a weekend, working as wait staff allows students to build up their social skills, stay active, enjoy free meals at work and posily educate themselves about different cuisines. However, food servers need to be on their feet for hours at a time and must be able to multi-task like professionals, so take this into account before submitting an application. The average salary is $ 9.00 hourly, but trips can raise that number.

Connie Monroe clicks a button, flicks her wrist and watches as her neighborhood floods. The shorelines are first to go. Then, the baseball fields at Fleming Park. By the time seawater reaches the senior center, it has flooded streets and over a dozen brick homes. Monroe moves her head up and down, side to side, taking in the simulated (仿真的) view. This is what could happen to Turner Station, a historic African American community southeast of Baltimore, as sea levels rise.

Climate change presents many challenges to coastal communities and to those trying to prepare for its impacts, but one of the most basic is also one of the most vexing: How do you show people and convince them of a possible future?

Communicating the realness and immediacy of the climate threat is hugely important to climate researchers and those aiming to lessen its causes. But it's also the most important to communities faced with coming changes that are already unavoidable. These projects need public support and input. That's why Monroe and other residents (居民) are being directed to sit in metal chairs, put on virtual reality headsets and watch their homes flood.

Turner Station, a community which gets flooded easily, is trying to prepare. It has partnered with the Port of Baltimore, a few nonprofits and a local landscape architecture firm to adopt a range of tools and ways to communicate climate change to the public, because every person is different and every place is different.

The virtual reality program is only the most recent, and perhaps the most effective step. Virtual reality is an immersive experience that can trick the human brain into thinking it's real. But tricking people is not the goal of the sea level rise simulation being used at Turner Station, says Juiano Calil, one of the program's developers. ''The goal, '' he says, ''is to start a conversation and help folks visualize the impacts of climate change and the solutions, and also discuss the trade-offs between them. ''

Before the end of the year, employees at Ubiquitous Energy, a company in Redwood City, Calif, will gather in a window-lined conference room to stare toward the future. That’s because their new glass windows will offer more than an amazing view of the North California landscape. They will also be able to power the company’s lights, computers and air conditioners.

Several years in the making, Ubiquitous’ energy-producing glass is a remarkable technological achievement. Its power lies in the layers of organic polymers (聚合物) between sheets of glass. As light enters the window,the flow of electrons between the polymer layers creates an electric current, which is then collected by tiny wires in the glass.

“It’s sort of like a transparent computer display run in reverse (反过来),” says Veeral Hardev, director of business development at Ubiquitous Energy. “Instead of electricity being shuttled to different points in a display to light them up, light is producing electricity to be shuttled out of different points in the window.”

Right now the windows produce about a third as much electricity from a given amount of sunlight as the typical solar cells used in roof panels (板).These windows, about half as transparent as ordinary glass, don’t work as well as transparent ones. Hardev says the company is likely to improve the transparency significantly. As for the lower output of electricity, he notes that windows can cover a much greater surface area than a roof, so numerous windows will produce a surprisingly larger amount of electricity than the production from a rooftop full of higher-efficiency solar panels. “You could do both.” says Hardev. “But you’ll get more from the windows. The biggest challenge, he adds, is increasing the windows from less than two square feet currently to about 50 square feet.”

If you’ve spent any amount of time boating, fishing, or bird-watching at lakes and rivers, you have most likely seen fishes jumping out of the water. I have seen it many times. Certainly, fishes will exit water in desperate attempts to escape enemies. Dolphins take advantage of the behavior, forming a circle and catching the frightened fishes in midair. But just as we may run fast from fun or from fear, different emotions might motivate fishes to jump.

Mobula rays（蝠鲼）aren’t motivated by fear when they throw their impressive bodies—up to a seventeen-foot wingspan (the distance from the end of one wing to the end of the other) and a ton in weight—skyward in leap（跳跃）of up to ten feet. They do it in schools（鱼群）of hundreds. They usually land on their bellies, but sometimes they land on their backs. Some scientists think it might be a way of removing parasites（寄生虫）. But I think that the rays are enjoying themselves.

In the clear waters of Florida’s Chassahowitzka National Wildlife Refuge, I watched several schools of fifty or more mullets（鲻鱼）moving in beautiful formation. Their well-built bodies were most evident when they leaped from the water. Most of the time I saw one or two leaps by a fish, but one made a series of seven. They usually land on their sides. Each jump was about a foot clear of the water and two to three feet in length.

Nobody knows for sure why the fish leaps. One idea is that they do it to take in oxygen. The idea is supported by the fact that mullets leap more when the water is lower in oxygen, but is challenged by the likelihood that jumping costs more energy than is gained by breathing air. It is hard to imagine they will feel any fresher when back in water.

Might these fishes also be leaping for fun? There is some new evidence. Gordon M. Burghardt recently published accounts of a dozen types of fishes leaping repeatedly, sometimes over floating objects—sticks, plants, sunning turtle—for no clear reason other than entertainment.