Tim Kruger: Can we stop climate change by removing CO2 from the air?
Tim Kruger: Podemos deter a alteração climática, eliminando o CO2 do ar?
Tim Kruger researches geoengineering: techniques to counteract climate change by deliberate, large-scale intervention in the earth system -- either by reflecting sunlight back into space or by reducing the level of carbon dioxide in the atmosphere. Full bio
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alteração climática,
to cut emissions rapidly.
rapidamente as emissões de CO2.
uncontentious statement,
that's slightly more contentious:
mais controversa:
our remaining carbon budget
do nosso orçamento de carbono,
extremely rapidly,
de forma extremamente rápida,
out of the atmosphere.
dióxido de carbono da atmosfera.
of these proposed techniques
toda uma gama de técnicas propostas
or in the oceans.
so-called artificial trees,
as chamadas árvores artificiais,
whether they can be applied
se elas podem ser aplicadas
economic and socially acceptable.
económica e socialmente aceitável.
will solve it on its own.
resolva o problema sozinha.
they may form the silver buckshot
podem ser a solução
climate change in its tracks.
a alteração climática.
on one particular idea
numa determinada ideia
to generate electricity
para gerar eletricidade
carbon dioxide out of the air.
o dióxido de carbono do ar.
feeds natural gas into a fuel cell.
uma célula de combustível com gás natural.
is converted into electricity,
é transformada em eletricidade
thinking that I'm nuts.
que eu sou maluco.
all of the carbon dioxide generated,
todo o dióxido de carbono gerado
and from the lime kiln, is pure,
como da fornalha de cal, é puro
either use that carbon dioxide
usar esse dióxido de carbono
deep underground at low cost.
no subsolo, a baixo custo.
can be used in industrial processes,
pode ser usado em processos industriais
it scrubs CO2 out of the air.
tem carbono negativo.
electricity from natural gas,
a eletricidade a partir do gás natural,
of CO2 into the air
that figure is minus 600.
generation is responsible
é responsável
of all carbon dioxide emissions.
as emissões de dióxido de carbono.
all power generation with this process,
toda a geração de energia
of the emissions from power generation
da geração de energia
from other sectors as well,
as emissões de outros setores,
of overall carbon emissions.
das emissões de carbono.
to counteract ocean acidification,
a acidificação dos oceanos,
by CO2 in the atmosphere.
que é provocado pelo CO2 na atmosfera.
pelo mesmo dinheiro.
carbon dioxide when you add it to seawater
quando a acrescentamos à água do mar
really complicated.
se complicam.
acidification is a good thing,
a acidificação do oceano,
what the environmental consequences are,
whether this treatment
se este tratamento
that it is seeking to cure.
que procuramos curar.
step-by-step governance
um controlo estrito, passo a passo,
a sua segurança.
alteração climática,
to remove trillions --
from the atmosphere in the decades ahead.
da atmosfera nas próximas décadas.
think defense-sized expenditure,
equivalentes aos da defesa —
colaterais prejudiciais.
of the scale of the problem
these thorny issues.
estes problemas espinhosos.
para onde quer que nos viremos:
and our efforts to counter climate change.
pela alteração climática
para compensar a alteração climática.
to close our eyes, block our ears,
de fechar os olhos, tapar os ouvidos
the consequences of our actions.
as consequências das nossas ações.
undermine the will to cut emissions?
a alteração climática
de reduzir as emissões?
importance of reducing emissions
a extrema importância
we still need to examine them.
continuamos a precisar de as examinar.
can't if we don't try.
se não tentarmos.
to restore the atmosphere,
para recuperar a atmosfera,
with a stable climate and healthy oceans.
e com oceanos saudáveis.
as a cathedral project.
o projeto para uma catedral.
and dig the foundations,
e cavar as fundações
to its full height.
o pináculo até à sua altura máxima.
but we must start in the hope
mas temos de começar,
possam terminar a nossa tarefa.
will be able to finish the job.
to ask you a couple of other questions.
fazer umas perguntas.
of putting lime in the ocean.
de deitar cal no oceano.
it's pretty compelling --
we need to do an experiment on this.
fazer experiências com isso.
experiment look like?
a series of experiments,
de fazer uma série de experiências
just very small stage-by-stage.
when you're trialing a new drug,
into human trials straight off.
em seres humanos.
are experiments entirely on land,
são experiências em terra,
away from the environment.
fora do meio ambiente.
that that can be done safely,
que se pode fazer com segurança,
the whole planet at some level.
têm impacto em todo o planeta.
experiments in national waters,
a uma escala pequena em águas nacionais,
of national funders to do that.
nacional para fazê-las.
to counter ocean acidification in this way
combater a acidificação por esta via,
in international waters,
em águas internacionais
an international community working on it.
internacional a trabalhar nisso.
you know, the ocean's all connected.
o oceano está todo interligado.
about doing experiments on the planet,
por se fazerem experiências no planeta,
which is really important.
muito importante.
para funcionar.
that it is impossible to do,
para experimentar,
ver o que podemos fazer
in a transparent way.
com as pessoas de modo transparente.
that the answer will come back,
de a resposta que recebermos seja:
That was really fascinating.
Foi fascinante.
ABOUT THE SPEAKER
Tim Kruger - Geoengineering researcherTim Kruger researches geoengineering: techniques to counteract climate change by deliberate, large-scale intervention in the earth system -- either by reflecting sunlight back into space or by reducing the level of carbon dioxide in the atmosphere.
Why you should listen
While it is essential that we reduce global carbon emissions, that isn't going to be enough to avoid dangerous climate change. Research into proposed geoengineering techniques could prove vital in the fight to protect our planet. At the Oxford Geoengineering Programme, Tim Kruger aims to assess the range of proposed geoengineering techniques to determine which, if any, could be both technically feasible and benign environmentally, socially and ethically.
Kruger, a James Martin Fellow at the University of Oxford, is a co-author of "The Oxford Principles," a draft code of conduct for geoengineering research. It calls for geoengineering to be regulated as a public good, for public participation in decision-making and for disclosure of research and open publication of results.
In addition to his work at Oxford, Kruger is also CEO of Origen Power, which is developing a process that uses natural gas to generate electricity in a way that removes carbon dioxide from the atmosphere.
Tim Kruger | Speaker | TED.com