Questões de Concursos Inglês

It has become clear that preventive diplomacy is only one
of a class of actions that can be taken to prevent disputes from
turning into armed conflict. Others in this class are preventive
deployment of military and(or) police personnel; preventive
humanitarian action, for example, to manage and resolve a
refugee situation in a sensitive frontier area; and preventive
peace-building, which itself comprises an extensive menu of
possible actions in the political, economic and social fields,
applicable especially to possible internal conflicts.
All these preventive actions share the following
characteristics: they all depend on early warning that the risk of
conflict exists; they require information about the causes and
likely nature of the potential conflict so that the appropriate
preventive action can be identified; and they require the consent
of the party or parties within whose jurisdiction the preventive
action is to take place.

The element of timing iscrucial. The potential conflict
should be ripe for the preventive action proposed. Timing is also
an important consideration in peace-making and peace-keeping.
The prevention, control and resolution of a conflict is like the
prevention, control and cure of a disease. If treatment is
prescribed at the wrong moment in the evolution of a disease, the
patient does not improve, and the credibility of both the treatment
and the physician who prescribed it is compromised.

Internet: (with adaptations).

Your answers to questions 21 to 24 must be based on the
text below entitled "A dip in the middle":

A dip in the middle
Source: The Economist (adapted)
Sep 8th 2005

Income tax has been paid in Britain for more
than two centuries. First introduced by William Pitt the
Younger to finance the war against Napoleonic France,
it is the Treasury´s biggest source of revenue, raising
30% of tax receipts. It arouses strong political emotions,
regarded as fair by some because it makes the rich pay a
bigger share of their income than the poor, but unfair by
others because it penalizes enterprise and hard work.
During the past 30 years, income tax has been
subject to sweeping changes, notably the cut in the top
rate from 98% to 40% under Margaret Thatcher between
1979 and 1988. Now another Conservative politician,
George Osborne, is floating a radical reform to match
that earlier exploit. The shadow chancellor announced
on September 7ththat he was setting up a commission
to explore the possible introduction of a flat income tax
in Britain.
Introducing a flat income tax into Britain would
involve two main changes. At present, there are three
marginal tax rates. These three rates would be replaced
by a single rate, which would be considerably lower than
the current top rate. At the same time there would be an
increase in the tax-free personal allowance, currently
worth 4,895 pounds.

A deep freeze this week in the Lone Star state, which relies on electricity to heat many homes, is causing power demand to skyrocket. At the same time, natural gas, coal, wind and nuclear facilities in Texas have been knocked offline by the unthinkably low temperatures.

“The extreme cold is causing the entire system to freeze up,” said Jason Bordoff, director of Columbia University’s Center on Global Energy Policy. “All sources of energy are underperforming in the extreme cold because they’re not designed to handle these unusual conditions.”

The ripple effects are being felt around the nation as Texas’ prolific oil-and-gas industry stumbles.

It’s striking that these power outages are happening in a state with abundant energy resources. Texas produces more electricity than any other US state — generating almost twice as much as Florida, the next-closest, according to federal statistics.

Wind power is also booming in Texas, which produced about 28% of all the US wind-powered electricity in 2019, the EIA said. But the problem is that not only is Texas an energy superpower, it tends to be an above-average temperature state. That means its infrastructure is ill-prepared for the cold spell currently wreaking havoc. And the consequences are being felt by millions.

Critics of renewable energy have pointed out that wind turbines have frozen or needed to be shut down due to the extreme weather.

Even though other places with colder weather (like Iowa and Denmark) rely on wind for even larger shares of power, experts said the turbines in Texas were not winterized for the unexpected freeze.

But this is not just about wind turbines going down. Natural gas and coal-fired power plants need water to stay online. Yet those water facilities froze in the cold temperatures and others lost access to the electricity they require to operate.

It’s too early to definitively say what went wrong in Texas and how to prevent similar outages. More information will need to be released by state authorities. Still, some experts say the criticism of wind power appears overdone already. “In terms of the blame game, the focus on wind is a red herring. It’s more of a political issue than what is causing the power problems on the grid,” said Dan Cohan, associate professor of environmental engineering at Rice University.

The energy crisis in Texas raises also questions about the nature of the state’s deregulated and decentralized electric grid. Unlike other states, Texas has made a conscious decision to isolate its grid from the rest of the country.

That means that when things are running smoothly, Texas can’t export excess power to neighboring states. And in the current crisis, it can’t import power either.

Internet: <www.cnn.com> (adapted).