I just got an MKR ENV shield to play with. At home I have only my Arduino Uno, but on the official site they state:
The MKR ENV Shield allows a MKR board to acquire environmental data collected by an array of sensors.
It seemed like the board was only compatible with an MKR board, but after some tests I figured out how to get the wiring done and the sensors working.
Wiring
Please note that the connections on the shield must be done on the male pins on the underlying part of the PCB. I suggest to connect the shield to a breadboard and connect the pins on the correspondent rows.
Hooray! The tough part is done :)
The code
To test everything you can just simply copy the example code from the MKR ENV shield’s Get started page on the Arduino website.
If everything goes right you should now see on your serial monitor the environmental data received by the Arduino.
Have fun with your new sensors!