旅游业对全球碳减排构成挑战
澳大利亚科学家研究认为，由于高涨的需求和技术效率提升缓慢，过去十年间与全球旅游业相关的碳排放有所增加。这些发现基于2009~2020年间的数据，凸显出需采取有效政策措施的紧迫性，使旅游业与全球气候目标保持一致。相关研究12月11日发表于《自然—通讯》。
旅游业是全球碳排放的一个主要来源。这一行业的快速增长及其碳密集的性质（尤其是与运输方式相关的特点），对全球减排工作构成挑战。理解旅游业碳排放的关键驱动因素，对于制定策略来缓解这一行业的环境影响十分重要。
昆士兰大学的孙雅彦和同事利用2009年至2020年间175个国家的数据，对全球旅游业碳足迹进行了全面分析。他们发现，全球旅游业排放每年增加3.5%（超过全球经济增长率的两倍，即每年1.5%），在betway体育:年达到了52亿吨二氧化碳当量。这相当于全球温室气体总排放的8.8%。这一增长的首要驱动因素是技术效率增长缓慢（每年0.3%）和旅游需求持续高增长（按2009年不变价格计算，每年增长3.8%）。这项研究还显示出人均旅游排放量上的明显差异，20个最高排放的国家碳足迹占全球总排放量的75%。
这些发现强调有必要采取紧迫的行动来减少旅游业排放。技术进步虽然带来了一定的减排，但不足以抵消旅游业的快速增长。这项研究还强调了设计全球减排政策时考虑经济差异的重要性。（来源：betway体育:科学报 冯维维）
相关论文信息：https://doi.org/10.1038/s41467-024-54582-7
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element block and removes
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function Anthem_EvalClientSideScript(result) {
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//Fix for bug #1429412, "Reponse callback returns previous response after file push".
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function Anthem_Clear__EVENTTARGET() {
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function Anthem_InvokePageMethod(methodName, args, clientCallBack, clientCallBackArg) {
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function Anthem_PostProcessCallBack(
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eventTarget,
clientCallBack,
clientCallBackArg,
imageUrlDuringCallBack,
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preProcessOut
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postCallBackFunction(control, e);
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clientCallBack(result, clientCallBackArg);
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function Anthem_FireCallBackEvent(
control,
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eventTarget,
eventArgument,
causesValidation,
validationGroup,
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textDuringCallBack,
enabledDuringCallBack,
preCallBackFunction,
postCallBackFunction,
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updatePageAfterCallBack
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// Cancel the callback if the control is disabled. Although most controls will
// not raise their callback event if they are disabled, the LinkButton will.
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validationGroup,
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callBackCancelledFunction,
preProcessOut
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if (preProcessResult) {
var eventType = e.type;
Anthem_FireEvent(
eventTarget,
eventArgument,
function(result) {
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result,
control,
eventType,
eventTarget,
null,
null,
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textDuringCallBack,
postCallBackFunction,
preProcessOut
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null,
includeControlValuesWithCallBack,
updatePageAfterCallBack
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function AnthemListControl_OnClick(
e,
causesValidation,
validationGroup,
textDuringCallBack,
enabledDuringCallBack,
preCallBackFunction,
postCallBackFunction,
callBackCancelledFunction,
includeControlValuesWithCallBack,
updatePageAfterCallBack
) {
var target = e.target || e.srcElement;
if (target.nodeName.toUpperCase() == "LABEL" && target.htmlFor != '')
return;
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Anthem_FireCallBackEvent(
target,
e,
eventTarget,
'',
causesValidation,
validationGroup,
'',
textDuringCallBack,
enabledDuringCallBack,
preCallBackFunction,
postCallBackFunction,
callBackCancelledFunction,
true,
true
);
}
// Returns the top, left control location in FireFox
function GetControlLocation(control) {
var offsetX = 0;
var offsetY = 0;
var parent;
for (parent = control; parent; parent = parent.offsetParent) {
if (parent.offsetLeft) {
offsetX += parent.offsetLeft;
}
if (parent.offsetTop) {
offsetY += parent.offsetTop;
}
}
return { x: offsetX, y: offsetY };
}
function GetLabelText(id) {
var labels = document.getElementsByTagName('label');
for (var i = 0; i < labels.length; i++) {
if (labels[i].htmlFor == id) {
return labels[i].innerHTML;
}
}
return null;
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function SetLabelText(id, text) {
var labels = document.getElementsByTagName('label');
for
