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New strategies must be developed to evaluate the understanding jingle bells jingle bells jingle all the gay with santa and unicorn ugly sweater of factors driving air pollution and integrated solutions to air pollution, such as tropospheric ozone, at regional to continental scales.

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ecosystem restoration and biodiversity conservation, and suggests an approach for building a new research agenda for sustainability science.  jingle bells jingle bells jingle all the gay with santa and unicorn ugly sweater  1 Possible large social, economic, or political threats such as war, terrorism, crime, financial collapse, or substance abuse are not part of this analysis. In part, this is because of the configuration and expertise of the board, but more so because of the absence of the kind of thinking and studies of such social threats that makes possible the comparative ranking and analysis of environmental threats that we undertake in this chapter. emissions. Thus, as gas usage increases worldwide, loss rates from gas field drilling and from wellheads must be decreased along with losses from gas distribution lines. Another global methane source,

rice paddies, are strongest emitters when fresh organic matter such as post-harvest stubble is plowed into the paddy soil.82 Burning the rice stubble is an historical alternative to placing the rice stubble in the soil. Yet some areas such as Sacramento, California, in efforts to prevent regional air pollution, are requiring the stubble to be plowed back into the soil, thereby potentially increasing methane emissions in the following growing season. Thus, a balance is needed between decreasing pollution sources and increasing other environmental effects through responsive technological fixes—for example, balancing the risks of local air pollution against greenhouse forcing of global climate change. sources of materials released to the atmosphere, the natural and human-influenced processing of those materials, and the multiple and interacting effects on exposed systems. In the case of the atmosphere, the scale at which this integrated management must take place ranges from the urban airshed to the globe.