Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Although the main consideration of policy must be the reduction in pollution at
source, there has been an increasing recognition that the biosphere is an important
sink for many pollutants, with plant canopies being considered more effective than
other land uses. Thus, the biosphere provides benefits additional to those associated
directly with their aesthetic and wildlife characteristics. Plants facilitate the uptake,
transport and assimilation or decomposition of many gaseous and particulate
pollutants. Indeed, the layered canopy structure of trees, which has evolved to
maximise photosynthesis and the uptake of carbon dioxide, provides a surface area of
between 2 and 12 times greater than the land...
Nội dung trích xuất từ tài liệu:
Adverse cardiovascular effects of air pollution
