Alin sa sumusunod na pahayag ang tumutukoy sa konsepto ng rehiyon bilang isa sa mga tema ng pag-aaral ng heograpiya?

Why is the color green callled green?

Which control would most likely achieve the greatest reduction of noise pollution? limiting airplane traffic insulating buildings and homes reducing road and highway traffic using headphones to listen to music building noise barriers beside highways

Without stratospheric ozone, which of the following would most likely occur? i. smog over major cities would be greatly reduced. ii. farms would produce surplus crops because of increased photosynthesis. iii. uv radiation would damage phytoplankton and reduce populations of aquatic consumers. i only ii only iii only i and ii i and iii