The 30th
celebration of earth day in the United States
The years have passed since the first earth Day,(present perfect tense) in 1970
when millions of people joined (past indefinite tense) in one of the largest
demonstrations of public opinion in the history of our country. That day, 20
million Americans participated in rallies, demonstrations to show their support
for the protection of our health and our environment.(past indefinite tense)
This earth Day we celebrate the cleanest environment in a generation.(present
indefinite tense ) But our job is not done. (Present indefinite passive )We still face environmental and
public health challenges(present indefinite tense). One of our biggest
challenges is climate change(.present tense of to be) Global warming is real
today.( present tense of to be) More than 2,000 of the world’s experts on the
global environment have told (present perfect tense)us that the effects of
climate change can be predicted. Last December the President announced new
standards(past indefinite tense). And for the first time, those standards
address not only the vehicles that people drive, but the fuels they use. (present
indefinite tense)Working together, we created common sense standards that
protect the public health. (past indefinite tense)There are also other sources
of harmful pollution.(present tense of to be) Over the next decade alone,
because of the investment made in the Energy Star Programme,(past indefinite
tense) Americans will save more that 24 billion dollars and help reduce
millions of tons of harmful pollutants(future indefinite active ). And the best
things about it – we’re not just saving money; (present continuos )we’re
reducing pollution, protecting the environment. (present continuous )Such
ecological problems will not be solved by government. (future indefinite
passive )They will not be solved by business.( Future indefinite passive )They
will be solved by us.(future indfinte passive )