Countless government entities and corporations have signed pledges to significantly reduce their carbon emissions, or even be net-zero, on various timelines. Dozens of nations have already indicated some level of commitment to achieving net-zero emissions by 2050. Some have already reached either carbon neutrality or are even carbon-negative, sequestering more greenhouse gas emissions (GHGEs) than they emit. These countries, like Suriname or Bhutan, are rich in natural resources and alternative energies. For much of the developed or developing world, achieving this can seem like a herculean task but it does not have to be.
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What is first needed to cut our emissions and prevent global temperature rise of two degrees Celsius – as recommended by the 2015 Paris Agreement – is widespread acknowledgement that the transportation sector is the largest source of GHGEs in most western economies and constitutes a significant share of the carbon portfolio elsewhere. In the United States, for example, approximately two-thirds of all transportation emissions come from private vehicles according to the Environmental Protection Agency (EPA). Further, emissions are only part of the problem. Roads and surface parking can occupy as much as 30 percent of a city’s area, causing heat islands. Freeways and overbuilt roads have a history of being used to displace or segregate minority communities. And noise pollution and particulates in the air are a detriment to public health.
Once there is acknowledgement that this is the source of various environmental issues, governments can begin addressing the problem in several ways. The first is energy transition. The EPA even lists this as its first example for reducing GHGEs. The best place to start with the energy transition is with public transit - if not to lead by example, to also commit regions to bolstering and future-proofing their energy grids for ever-increasing demands. In many regions, mass transit networks are the largest consumers of electricity, and full conversion to alternative fuels will require more capacity on power grids than currently exist – notwithstanding any significant leaps in battery technology. As such, the first step governments and energy companies must take is to increase capacity – a no-regret investment.