It's a status crime: the actus reus prohibits the public possession ("having") of a bladed or sharply pointed article (including a folding pocketknife if the blade is more than 3" long): s. 139(1), (2) and (3). It is not a conduct crime, because the crime does not require proof of any act (or omission); nor is it a result crime, as it does not require proof of any result/consequence of possession. Status crimes (sometimes also referred to as "situational" crimes) merely criminalise someone's status or situation (other examples taken from various statutes are being found drunk in a public place; being an illegal alien; being in possession of prohibited drugs).

I assume you are referring to the laws which criminalise the use of certain drugs for recreation.

These laws are entirely inappropriate and do nothing to help society. They in fact case the creation of a black market and very powerful criminal organisations.

If recreational drug use was treated under law in the same way as recreational alcohol drinking then the criminal organisations that thrive through the black market would instantly loose the bulk of their revenue and so their influence. Users would be far less likely to suffer from the effects of badly cut drugs and could get help to remove addiction without becoming criminalised. And the government could make good tax revenue that would pay for the treatment of drug users through the sale of the drugs. Eventually the problem would disappear as victims of drug abuse would get the help they need to be cured!

I believe some jurisdictions in the United States have anacted a "Good Samaritan Law". The law basically says that if you see someone in trouble and you don't help them, that could be a crime.

I have added a link for you to follow on a good article.

The good Samaritan act is not to criminalise failure to help but to prevent those that do help from being sued. Being sued, especially in the west, many see as a great danger when attempting to help someone.

Failing to reduce a known or perceived hazard, especially in the workplace, would be considered a crime.

Slavery does exist today, in many countries in Africa and Asia. Most of it doesn't look like the plantation slavery of the antebellum South in America, though some of that does exist, especially on cocoa plantations in Africa. Slavery today often consists of women or children sold into slavery as domestic servants or for prostitution.

Slavery occurs in many modern developed countries, as well as third world countries. It's mostly known as human trafficking. The United States, United Kingdom, Mexico, Thailand. Russia, Poland, China, France. are big contributors to this distributing crime.

it does not happen in america but in other countries, they still have it because it is free work

Slavery is growing and is still larger than it is ever was during the transatlantic slavery period. USA was responsible for massively endorsing one of the biggest attrocities in modern history. This was based solely on race, and while other countries played their part, America was one of the last world powers to criminalise it. USA does seem to forget they were largely responsible for the most racist travisty in history. Around 12 million slaves died in america alone (twice as many as jews murdered in WW2). Even though USA is ranked low on the global slavery index it is still present. No country is exempt from slavery. It is a massive global issue and one that the USA and american businesses still encourage by not insisting on slave labour in the production of purchased materials and goods. It is thought that 27 million people are currently enslaved globally and as to why, it is a method of free labour and exploitation for monetary gain.

Students, the most powerful stratum of the society, knows the importance of environment and nature sustainability. Nature has endowed us with all the resources to which maximum beneficiary is human beings. Nature has full proof system of protection of all the creatures and environment subject to check on excessive pollution and resources utilisation.

Students understand the need for protecting environment and they are prepared to fight against the contamination of atmosphere as todays student is tomorrow's citizen. They show the consciousness and save the various energy sources by going on foot or bicycle to schools and other places. Students may Go to bed in the evening no sooner sun sets. They may develop the habits of Reading and writing in day lights. With their efficient skills of interaction with other parts of the society, they communicate to the society about need for protecting environment. Students may promot use of cold water in day to day activities if temperature/atmosphere permit. Students need to promote the plantation in surrounding areas. They should help the government and non government organisation in preventing pollution from the society by actively participating in programmes and by giving the informations of those who pollutes the environment.

Students in all disciplines of education may contribute some from the knowledge in the area of their expertise. They make creative contribution to arrest pollution and protect environment. It is not only industrial pollution but the pollution from various day to day operations that needs checking for protecting environment. Thus student can play a pivotal role in changing the scenario of protecting environment.