S

Sahel 308-310, 344 salinas 269,275,281,283,287 salinity 227,233,236-238,241,246-248, 251,253-259,281,283,285,289, 350

salt accumulation 240 compartmentation 241,242 dilution 238,241 exclusion 237-239,281,283,287 excretion 237, 238, 245 glands 238, 239, 243,245 inclusion 237-239, 277,279,280 marsh 269,270

spray 248,289 succulence 241 sand dunes 270 Santalales 188

savanna 3, 5,6,11,21,39, 55, 155,209,210, 219,293,313,379,380,400 concept 301 grass 299 herb 299

hyperseasonal 60, 304, 311 marsh 60, 299, 304 problem 305 rock 379 seasonal 304,311 semi-seasonal 304 saxicolously 380 sclerophyllous 329 scytonemin 259,393 seasonality 13, 20, 51, 59, 149, 301, 304,

313,323,381 secondary thickening 175, 176, 188 secretion enzyme 356 seed 138 dormancy 138 germination 138 seed banks 138 seedling 138

survival 138, 139 seedling bank 138 selection 72 natural 1 self-ignition 362 semi-arid 21 senescence 151 shade and sun plants 135 shade plants 103, 105-107, 110, 113, 114,

118,124, 130,139,142,288 shade-demanding 195 shade-tolerant 195 silviculture 7, 8 singlet state 121

soil 90-94,96, 151,176,212,285,315, 323, 335,337-339, 341,342,346, 347,349, 351,353, 356,358,360,364,366, 430 ferralitic 358 inundated 234 moisture 149 swampy 233 water capacity 313,314 spillover 121,125 stable isotope analysis 33 starvation 156,157,253 stem 82

stem flow nutrient concentration 90 stomata 2,36,88, 107,119,131,132,134, 135,151-153, 155,157,158, 160, 188, 195,200, 203, 246,252,253,285, 320, 328,333,334,439 stomatal conductance 36, 246, 321 stomatal diffusion 37 stomatal regulation 37 strain 70 elastic 126,153,422 plastic 126,153,422 stranglers 176, 178, 200, 203, 209 strata 87, 88, 90 stratification 84 stress 70, 183 avoidance 281,287 high-irradiance 118 light 103 osmotic 434 salinity 189 stress concept 69, 70 stressor 69-71, 191 stroma 109 strontium 42

succession 73,106,107, 138,139,275 progressive 73 regressive 73 succulence 82,197, 200, 201,239-243, 249, 279-281,287,326,380 stem 329-331 sulphate 280,360

sun plants 85,103, 105-107, 110,114, 124,

130,139,142,194,288 supercooling 422,428,430, 434-436, 438 synecology 2, 3

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Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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