Today, I’ll tell you a simple but scientifically based life tip.

 

 

1. These days, in the hot summer, you probably know that you should wear a white T-shirt to feel less hot. In the case of a parasol, it can be the opposite.

 

 

When viewed with a thermal imaging camera, black absorbs sunlight and white reflects sunlight. A black umbrella absorbs both sunlight and light reflected from the ground, lowering the temperature of the head.

 

 

White umbrellas block sunlight, but you can see that the light reflected on the ground is reflected back and heats your head. Generally, black parasols have better UV protection,

and parasols with a light color on the outside and black on the inside are more effective.

 

 

2. When using water outdoors, such as while camping, you can make a hole in a plastic bottle and open the cap like a faucet so that water comes out and you can wash your hands.

If you close the lid, the atmospheric pressure and the air pressure will be balanced, so the water will not come out, and you can use it like a simple storage faucet.