McConville A., Emission standards handbook. IEA Coal Research, International Energy Agency, London, UK, 1997.
Covering 21 countries, the handbook includes legislation in the EC countries, the fourteen IEA Coal Research member countries, two East European countries (Poland and Czechoslovakia) and other countries which are significant users of coal, such as Taiwan, which have introduced, or plan to adopt, relevant emission standards. Several international agreements and standards are also discussed and explained.
It will keep weeds away; protect the plants by keeping the soil cool; decrease evaporation and reduce soil compaction. Be creative and use materials like: pebbles, bark chippings, gravel, cocoa shells, decorative pine cones, marbles, broken crockery, grass clippings or leaf mould. But avoid mulching too close to the stems to avoid the plant rotting in winter.
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