What distinguishes brownfields from other land being considered for development? The difference is that a brownfield redevelopment project has to take into account its past (land use), all the existing buildings (reuse and cultural interest) and the contextualization scale (urban or rural extra urban), along with the associated environmental issues.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

a compound light microscope is used to magnify objects in steps.  

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