What does SLR camera photography mean: white plus black minus? I'm taking pictures of the scenery in the sun. I want to make the trees greener and cleaner. Should I reduce my exposure?

This has something to do with photometry. All photometric systems are based on 18% ash. If you shoot a large area of white objects, the camera will treat the white wall as 18 gray, so the intensity of shooting is not pure white, so you should add exposure to make the intensity white. On the contrary, so is black physics. Shooting trees in the sun doesn't need to increase or decrease exposure. The reflectivity of green trees is close to 18% gray, but shooting in strong light will increase the contrast. The most important thing in photography is to control the contrast. It is recommended not to take pictures at noon when the sun is strong.