Prepare news on climate change to spread awareness amongst the people. You can include the causes and effects of climate change in short.
Answers
Answer:
These have been caused by many natural factors, including changes in the sun, emissions from volcanoes, variations in Earth's orbit and levels of carbon dioxide. Global climate change has typically occurred very slowly over thousands or millions of years.
Explanation:
What is primary key ?
A primary key is a column or a set of columns in a table whose values uniquely identify a row in the table.
What is foreign key ?
... A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.
What is candidate key ?
Candidate Key is a super key with no repeated attributes.
What is alternate key ?
Alternate Key – is a column or group of columns in a table that uniquely identify every row in that table. ...